<?xml version="1.0" encoding="UTF-8"?>
<!-- Documents rendered in XBRL format prepared by Certent CDM XBRL Version: 19.9.1 using Fujitsu Interstage XWand -->
<!-- Validation status: Passed -->
<schema targetNamespace="http://www.quakerchem.com/20190930" elementFormDefault="qualified" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:kwr="http://www.quakerchem.com/20190930" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
    <annotation>
        <appinfo>
            <link:linkbaseRef xlink:type="simple" xlink:href="kwr-20190930_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
            <link:linkbaseRef xlink:type="simple" xlink:href="kwr-20190930_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
            <link:linkbaseRef xlink:type="simple" xlink:href="kwr-20190930_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
            <link:linkbaseRef xlink:type="simple" xlink:href="kwr-20190930_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
            <link:roleType roleURI="http://www.quakerchem.com/role/CondensedConsolidatedStatementsOfOperations" id="ELRID_CondensedConsolidatedStatementsOfOperations">
                <link:definition>000200 - Statement - Condensed Consolidated Statements of Operations</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/CondensedConsolidatedBalanceSheets" id="ELRID_CondensedConsolidatedBalanceSheets">
                <link:definition>000300 - Statement - Condensed Consolidated Balance Sheets</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/CondensedConsolidatedBalanceSheetsParentheticals" id="ELRID_CondensedConsolidatedBalanceSheetsParentheticals">
                <link:definition>000400 - Statement - Condensed Consolidated Balance Sheets (Parentheticals)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/StatementCondensedConsolidatedStatementOfCashFlows" id="ELRID_CondensedConsolidatedStatementOfCashFlows">
                <link:definition>000500 - Statement - Condensed Consolidated Statement of Cash Flows</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/IncomeTaxesAndUncertainTaxPositions" id="ELRID_IncomeTaxesAndUncertainTaxPositions">
                <link:definition>011110 - Disclosure - Income Taxes and Uncertain Tax Positions</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/FairValueMeasurements" id="ELRID_FairValueMeasurements">
                <link:definition>011810 - Disclosure - Fair Value Measurements</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/HedgingActivities" id="ELRID_HedgingActivities">
                <link:definition>012010 - Disclosure - Hedging Activities</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/ShareBasedCompensation" id="ELRID_ShareBasedCompensation">
                <link:definition>010810 - Disclosure - Share-Based Compensation</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/EarningsPerShare" id="ELRID_EarningsPerShare">
                <link:definition>011210 - Disclosure - Earnings Per Share</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/BusinessSegments" id="ELRID_BusinessSegments">
                <link:definition>010410 - Disclosure - Business Segments</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/GoodwillAndIntangibleAssets" id="ELRID_GoodwillAndIntangibleAssets">
                <link:definition>011410 - Disclosure - Goodwill and Intangible Assets</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/PensionAndPostretirementBenefits" id="ELRID_PensionAndPostretirementBenefits">
                <link:definition>010910 - Disclosure - Pension and Postretirement Benefits</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/CommitmentsAndContingencies" id="ELRID_CommitmentsAndContingencies">
                <link:definition>011910 - Disclosure - Commitments and Contingencies</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/EquityAndNoncontrollingInterest" id="ELRID_EquityAndNoncontrollingInterest">
                <link:definition>011610 - Disclosure - Equity and Noncontrolling Interest</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/RecentlyIssuedAccountingStandards" id="ELRID_RecentlyIssuedAccountingStandards">
                <link:definition>010310 - Disclosure - Recently Issued Accounting Standards</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/DisclosureCondensedFinancialInformation" id="ELRID_CondensedFinancialInformation">
                <link:definition>010110 - Disclosure - Condensed Financial Information</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/CondensedConsolidatedStatementsOfComprehensiveLossIncome" id="ELRID_CondensedConsolidatedStatementsOfComprehensiveLossIncome">
                <link:definition>000250 - Statement - Condensed Consolidated Statements of Comprehensive (Loss) Income</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/DisclosureAccountingPoliciesPolicies" id="ELRID_AccountingPoliciesPolicies">
                <link:definition>020110 - Disclosure - Accounting Policies (Policies)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/DisclosureCondensedFinancialInformationDetails" id="ELRID_CondensedFinancialInformationDetails">
                <link:definition>040110 - Disclosure - Condensed Financial Information (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/EarningsPerShareTables" id="ELRID_EarningsPerShareTables">
                <link:definition>031110 - Disclosure - Earnings Per Share (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/PensionAndPostretirementBenefitsDetails" id="ELRID_PensionAndPostretirementBenefitsDetails">
                <link:definition>040910 - Disclosure - Pension and Postretirement Benefits (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/DebtTables" id="ELRID_DebtTables">
                <link:definition>031510 - Disclosure - Debt (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/IncomeTaxesAndUncertainTaxPositionsDetails" id="ELRID_IncomeTaxesAndUncertainTaxPositionsDetails">
                <link:definition>041110 - Disclosure - Income Taxes and Uncertain Tax Positions (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/FairValueMeasurementsTables" id="ELRID_FairValueMeasurementsTables">
                <link:definition>031710 - Disclosure - Fair Value Measurements (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/EarningsPerShareBasicDetails" id="ELRID_EarningsPerShareBasicDetails">
                <link:definition>041210 - Disclosure - Earnings Per Share - Basic (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/EarningsPerShareDilutedDetails" id="ELRID_EarningsPerShareDilutedDetails">
                <link:definition>041220 - Disclosure - Earnings Per Share - Diluted (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/EarningsPerShareNarrativeDetails" id="ELRID_EarningsPerShareNarrativeDetails">
                <link:definition>041230 - Disclosure - Earnings Per Share - Narrative (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/FairValueMeasurementsAssetsDetails" id="ELRID_FairValueMeasurementsAssetsDetails">
                <link:definition>041710 - Disclosure - Fair Value Measurements - Assets (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/BusinessCombinationsPurchaseAccountingDetails" id="ELRID_BusinessCombinationsPurchaseAccountingDetails">
                <link:definition>040220 - Disclosure - Business Combinations - Purchase accounting (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/BusinessCombinationOtherDetails" id="ELRID_BusinessCombinationOtherDetails">
                <link:definition>040225 - Disclosure - Business Combination- Other (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/EquityAndNoncontrollingInterestTables" id="ELRID_EquityAndNoncontrollingInterestTables">
                <link:definition>031610 - Disclosure - Equity and Noncontrolling Interest (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/BusinessSegmentsTables" id="ELRID_BusinessSegmentsTables">
                <link:definition>030410 - Disclosure - Business Segments (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/BusinessSegmentsDetails" id="ELRID_BusinessSegmentsDetails">
                <link:definition>040409 - Disclosure - Business Segments (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/EquityAndNoncontrollingInterestDetails" id="ELRID_EquityAndNoncontrollingInterestDetails">
                <link:definition>041610 - Disclosure - Equity and Noncontrolling Interest (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/HedgingActivitiesTables" id="ELRID_HedgingActivitiesTables">
                <link:definition>031910 - Disclosure - Hedging Activities (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/HedgingActivitiesTableDetails" id="ELRID_HedgingActivitiesTableDetails">
                <link:definition>041920 - Disclosure - Hedging Activities - Table (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/HedgingActivitiesNarrativeDetails" id="ELRID_HedgingActivitiesNarrativeDetails">
                <link:definition>041910 - Disclosure - Hedging Activities - Narrative (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/EquityAndNoncontrollingInterestParentheticalsDetails" id="ELRID_EquityAndNoncontrollingInterestParentheticalsDetails">
                <link:definition>041620 - Disclosure - Equity and Noncontrolling Interest - Parentheticals (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/ShareBasedCompensationTables" id="ELRID_ShareBasedCompensationTables">
                <link:definition>030810 - Disclosure - Share-Based Compensation (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/ShareBasedCompensationExpenseTableDetails" id="ELRID_ShareBasedCompensationExpenseTableDetails">
                <link:definition>040810 - Disclosure - Share-Based Compensation - Expense Table (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/GoodwillAndIntangibleAssetsTables" id="ELRID_GoodwillAndIntangibleAssetsTables">
                <link:definition>031310 - Disclosure - Goodwill and Intangible Assets (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/GoodwillAssetsDetails" id="ELRID_GoodwillAssetsDetails">
                <link:definition>041410 - Disclosure - Goodwill Assets (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/CommitmentsAndContingenciesDetails" id="ELRID_CommitmentsAndContingenciesDetails">
                <link:definition>041810 - Disclosure - Commitments and Contingencies (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/ShareBasedCompensationNarrativeDetails" id="ELRID_ShareBasedCompensationNarrativeDetails">
                <link:definition>040820 - Disclosure - Share-Based Compensation - Narrative (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/FairValueMeasurementsLiabilitiesDetails" id="ELRID_FairValueMeasurementsLiabilitiesDetails">
                <link:definition>041720 - Disclosure - Fair Value Measurements - Liabilities (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/FairValueMeasurementsLevel3RollforwardDetails" id="ELRID_FairValueMeasurementsLevel3RollforwardDetails">
                <link:definition>041730 - Disclosure - Fair Value Measurements - Level 3 Rollforward (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/IntangibleAssetsDetails" id="ELRID_IntangibleAssetsDetails">
                <link:definition>041420 - Disclosure - Intangible Assets (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/IntangibleAssetsAmortizationDetails" id="ELRID_IntangibleAssetsAmortizationDetails">
                <link:definition>041430 - Disclosure - Intangible Assets - Amortization (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/ShareBasedCompensationExcessTaxBenefitDetails" id="ELRID_ShareBasedCompensationExcessTaxBenefitDetails">
                <link:definition>040830 - Disclosure - Share-Based Compensation - Excess Tax Benefit (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/BusinessCombinations" id="ELRID_BusinessCombinations">
                <link:definition>010210 - Disclosure - Business Combinations</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/EquityAndNoncontrollingInterestReclassificationsDetails" id="ELRID_EquityAndNoncontrollingInterestReclassificationsDetails">
                <link:definition>041630 - Disclosure - Equity and Noncontrolling Interest - Reclassifications (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/DebtNarrativeDetails" id="ELRID_DebtNarrativeDetails">
                <link:definition>041510 - Disclosure - Debt - Narrative (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/Debt" id="ELRID_Debt">
                <link:definition>011510 - Disclosure - Debt</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/OtherIncomeExpense" id="ELRID_OtherIncomeExpense">
                <link:definition>011010 - Disclosure - Other Income (Expense)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/OtherIncomeExpenseTables" id="ELRID_OtherIncomeExpenseTables">
                <link:definition>031010 - Disclosure - Other Income (Expense) (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/OtherIncomeexpenseDetails" id="ELRID_OtherIncomeexpenseDetails">
                <link:definition>041010 - Disclosure - Other Income (expense) - (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/CondensedFinancialInformationForeignCurrencyDetails" id="ELRID_CondensedFinancialInformationForeignCurrencyDetails">
                <link:definition>040120 - Disclosure - Condensed Financial Information - Foreign currency (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/IntangibleAssetsFutureAmortizationDetails" id="ELRID_IntangibleAssetsFutureAmortizationDetails">
                <link:definition>041440 - Disclosure - Intangible Assets - Future Amortization (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/IntangibleAssetsFiniteLivedDetails" id="ELRID_IntangibleAssetsFiniteLivedDetails">
                <link:definition>041450 - Disclosure - Intangible Assets - Finite Lived (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/RestructuringAndRelatedActivities" id="ELRID_RestructuringAndRelatedActivities">
                <link:definition>010710 - Disclosure - Restructuring and Related Activities</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/RestructuringActivitiesTables" id="ELRID_RestructuringActivitiesTables">
                <link:definition>030710 - Disclosure - Restructuring Activities (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/RestructuringActivitiesNarrativeDetails" id="ELRID_RestructuringActivitiesNarrativeDetails">
                <link:definition>040710 - Disclosure - Restructuring Activities - Narrative (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/RestructuringActivitiesDetails" id="ELRID_RestructuringActivitiesDetails">
                <link:definition>040720 - Disclosure - Restructuring Activities (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/DocumentAndEntityInformation" id="ELRID_DocumentAndEntityInformation">
                <link:definition>000100 - Document - Document and Entity Information</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/ShareBasedCompensationOptionsGrantDetails" id="ELRID_ShareBasedCompensationOptionsGrantDetails">
                <link:definition>040840 - Disclosure - Share-Based Compensation - Options Grant (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/BusinessCombinationsDetails" id="ELRID_BusinessCombinationsDetails">
                <link:definition>040210 - Disclosure - Business Combinations (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/RecentlyIssuedAccountingStandardsNarrativeDetails" id="ELRID_RecentlyIssuedAccountingStandardsNarrativeDetails">
                <link:definition>040310 - Disclosure - Recently Issued Accounting Standards - Narrative (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/NetSalesAndRevenueRecognition" id="ELRID_NetSalesAndRevenueRecognition">
                <link:definition>010510 - Disclosure - Net Sales and Revenue Recognition</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/NetSalesAndRevenueRecognitionTables" id="ELRID_NetSalesAndRevenueRecognitionTables">
                <link:definition>030510 - Disclosure - Net Sales and Revenue Recognition (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/NetSalesAndRevenueRecognitionNarrativeDetails" id="ELRID_NetSalesAndRevenueRecognitionNarrativeDetails">
                <link:definition>040510 - Disclosure - Net Sales and Revenue Recognition - Narrative (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/NetSalesAndRevenueRecognitionDetails" id="ELRID_NetSalesAndRevenueRecognitionDetails">
                <link:definition>040520 - Disclosure - Net Sales and Revenue Recognition (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/RestrictedCash" id="ELRID_RestrictedCash">
                <link:definition>011310 - Disclosure - Restricted Cash</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/RestrictedCashTables" id="ELRID_RestrictedCashTables">
                <link:definition>031210 - Disclosure - Restricted Cash (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/RestrictedCashDetails" id="ELRID_RestrictedCashDetails">
                <link:definition>041310 - Disclosure - Restricted Cash (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/LeasesNarrativeDetails" id="ELRID_LeasesNarrativeDetails">
                <link:definition>040625 - Disclosure - Leases Narrative (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/LeasesBalanceSheetDetails" id="ELRID_LeasesBalanceSheetDetails">
                <link:definition>040626 - Disclosure - Leases Balance Sheet (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/LeasesMaturityOfLeaseLiabilitiesDetails" id="ELRID_LeasesMaturityOfLeaseLiabilitiesDetails">
                <link:definition>040627 - Disclosure - Leases Maturity of Lease Liabilities (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/LeasesOperatingLeasesDetails" id="ELRID_LeasesOperatingLeasesDetails">
                <link:definition>040628 - Disclosure - Leases Operating Leases (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/Leases" id="ELRID_Leases">
                <link:definition>010610 - Disclosure - Leases</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/LeasesTables" id="ELRID_LeasesTables">
                <link:definition>030610 - Disclosure - Leases (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/SubsequentEvents" id="ELRID_SubsequentEvents">
                <link:definition>012110 - Disclosure - Subsequent Events</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/BusinessCombinationsTables" id="ELRID_BusinessCombinationsTables">
                <link:definition>030310 - Disclosure - Business Combinations (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/DebtTableInterestRatesDetails" id="ELRID_DebtTableInterestRatesDetails">
                <link:definition>041509 - Disclosure - Debt - Table Interest rates (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/DebtTableDetails" id="ELRID_DebtTableDetails">
                <link:definition>041508 - Disclosure - Debt - Table (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/DebtMaturitySchedulesDetails" id="ELRID_DebtMaturitySchedulesDetails">
                <link:definition>041511 - Disclosure - Debt - Maturity Schedules (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/DebtInterestExpenseTableDetails" id="ELRID_DebtInterestExpenseTableDetails">
                <link:definition>041512 - Disclosure - Debt - Interest Expense Table (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/BusinessCombinationsFairValueDisclosureDetails" id="ELRID_BusinessCombinationsFairValueDisclosureDetails">
                <link:definition>040215 - Disclosure - Business Combinations- Fair Value Disclosure (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/BusinessCombinationProFormaDetails" id="ELRID_BusinessCombinationProFormaDetails">
                <link:definition>040221 - Disclosure - Business combination - Pro Forma (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://www.quakerchem.com/role/PensionAndPostretirementBenefitsTables" id="ELRID_PensionAndPostretirementBenefitsTables">
                <link:definition>030910 - Disclosure - Pension and Postretirement Benefits (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
        </appinfo>
    </annotation>
    <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
    <import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
    <import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
    <import namespace="http://fasb.org/us-gaap/2019-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd" />
    <import namespace="http://xbrl.sec.gov/dei/2019-01-31" schemaLocation="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd" />
    <import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
    <import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
    <element name="IncomeLossFromContinuingOperationsBeforeMinorityInterestAndIncomeLossFromEquityMethodInvestments" id="kwr_IncomeLossFromContinuingOperationsBeforeMinorityInterestAndIncomeLossFromEquityMethodInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="IncreaseDecreaseInDeferredCompensationAndOtherNet" id="kwr_IncreaseDecreaseInDeferredCompensationAndOtherNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="ExcessTaxBenefitFromShareBasedCompensationNonCash" id="kwr_ExcessTaxBenefitFromShareBasedCompensationNonCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="RestrictedInsuranceReceivable" id="kwr_RestrictedInsuranceReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="CeoTransitionCosts" id="kwr_CeoTransitionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="NetReportingAmount" id="kwr_NetReportingAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="OperatingIncomeLossSegmentReporting" id="kwr_OperatingIncomeLossSegmentReporting" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="StockIssuedDuringPeriodValueAndAdjustmentsToAdditionalPaidInCapitalShareBasedCompensationAndExerciseOfStockOptions" id="kwr_StockIssuedDuringPeriodValueAndAdjustmentsToAdditionalPaidInCapitalShareBasedCompensationAndExerciseOfStockOptions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="NonoperatingCharges" id="kwr_NonoperatingCharges" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="EffectOfUncertainTaxPositionAdjustmentsEarningsPerShareDiluted" id="kwr_EffectOfUncertainTaxPositionAdjustmentsEarningsPerShareDiluted" type="num:perShareItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="OtherLiabilitiesCurrentMember" id="kwr_OtherLiabilitiesCurrentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="StockOptionsCompensationExpenseMember" id="kwr_StockOptionsCompensationExpenseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="NonvestedStockAwardsCompensationExpenseMember" id="kwr_NonvestedStockAwardsCompensationExpenseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="EmployeeStockPurchasePlanCompensationExpenseMember" id="kwr_EmployeeStockPurchasePlanCompensationExpenseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MatchingStockContribution401KPlanCompensationExpenseMember" id="kwr_MatchingStockContribution401KPlanCompensationExpenseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="DirectorsStockOwnershipPlanCompensationExpenseMember" id="kwr_DirectorsStockOwnershipPlanCompensationExpenseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="FiniteLivedTrademarksFormulationsAndProductTechnology" id="kwr_FiniteLivedTrademarksFormulationsAndProductTechnology" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="FiniteLivedIntangibleAssetsAccumulatedAmortizationAbstract" id="kwr_FiniteLivedIntangibleAssetsAccumulatedAmortizationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="LossContingencyRangeOfOperationWellP2" id="kwr_LossContingencyRangeOfOperationWellP2" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="LossContingencyRangeOfOperationWellP3" id="kwr_LossContingencyRangeOfOperationWellP3" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="OneJurisdictionExposurePercentage" id="kwr_OneJurisdictionExposurePercentage" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="AcpMember" id="kwr_AcpMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="SbDeckingMember" id="kwr_SbDeckingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="RestrictedStockGaipPlanMember" id="kwr_RestrictedStockGaipPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ShareBasedCompensationArrangementBySharebasedPaymentAwardForfeitureRatePercent" id="kwr_ShareBasedCompensationArrangementBySharebasedPaymentAwardForfeitureRatePercent" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisablePeriod" id="kwr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisablePeriod" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedAwardsVestingPeriod" id="kwr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedAwardsVestingPeriod" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="ShareBasedGoodsAndNonemployeeServicesTransactionSharesApprovedForIssuanceExpectedTerm" id="kwr_ShareBasedGoodsAndNonemployeeServicesTransactionSharesApprovedForIssuanceExpectedTerm" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="FiniteLivedIntangibleAssetsAmortizationExpenseCurrentFiscalYear" id="kwr_FiniteLivedIntangibleAssetsAmortizationExpenseCurrentFiscalYear" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="SharebasedCompensationArrangementBySharebasedPaymentAwardMaximumNumberOfSharesPercentagePerEmployee" id="kwr_SharebasedCompensationArrangementBySharebasedPaymentAwardMaximumNumberOfSharesPercentagePerEmployee" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="DirectorStockOwnershipCashRetainer" id="kwr_DirectorStockOwnershipCashRetainer" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="DirectorRetainerAnnualFee" id="kwr_DirectorRetainerAnnualFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="SummitEarnoutQuantitativeDisclosuresMember" id="kwr_SummitEarnoutQuantitativeDisclosuresMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="TechniquimiaHoldbackQuantitativeDisclosuresMember" id="kwr_TechniquimiaHoldbackQuantitativeDisclosuresMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="NoncompetitionAgreementObligationQuantitativeDisclosuresMember" id="kwr_NoncompetitionAgreementObligationQuantitativeDisclosuresMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="GWSmithHoldbackQuantitativeDisclosuresMember" id="kwr_GWSmithHoldbackQuantitativeDisclosuresMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="CashSurrenderValueCompanyOwnedLifeInsuranceFairValueDisclosure" id="kwr_CashSurrenderValueCompanyOwnedLifeInsuranceFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="CashSurrenderValueCompanyOwnedLifeInsuranceDeferredCompensationAssetsFairValueDisclosure" id="kwr_CashSurrenderValueCompanyOwnedLifeInsuranceDeferredCompensationAssetsFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="AvailableForSaleSecuritiesAssetsLargeCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure" id="kwr_AvailableForSaleSecuritiesAssetsLargeCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="AvailableForSaleSecuritiesAssetsMidCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure" id="kwr_AvailableForSaleSecuritiesAssetsMidCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="AvailableForSaleSecuritiesAssetsSmallCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure" id="kwr_AvailableForSaleSecuritiesAssetsSmallCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="AvailableForSaleSecuritiesAssetsInternationalDevelopedAndEmergingMarketsRegisteredInvestmentCompaniesFairValueDisclosure" id="kwr_AvailableForSaleSecuritiesAssetsInternationalDevelopedAndEmergingMarketsRegisteredInvestmentCompaniesFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="AvailableForSaleSecuritiesAssetsFixedIncomeRegisteredInvestmentCompaniesFairValueDisclosure" id="kwr_AvailableForSaleSecuritiesAssetsFixedIncomeRegisteredInvestmentCompaniesFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="AvailableForSaleSecuritiesLiabilitiesFairValueDisclosure" id="kwr_AvailableForSaleSecuritiesLiabilitiesFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="AvailableForSaleSecuritiesLiabilitiesLargeCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure" id="kwr_AvailableForSaleSecuritiesLiabilitiesLargeCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="AvailableForSaleSecuritiesLiabilitiesMidCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure" id="kwr_AvailableForSaleSecuritiesLiabilitiesMidCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="AvailableForSaleSecuritiesLiabilitiesSmallCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure" id="kwr_AvailableForSaleSecuritiesLiabilitiesSmallCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="AvailableForSaleSecuritiesLiabilitiesInternationalDevelopedAndEmergingMarketsRegisteredInvestmentCompaniesFairValueDisclosure" id="kwr_AvailableForSaleSecuritiesLiabilitiesInternationalDevelopedAndEmergingMarketsRegisteredInvestmentCompaniesFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="AvailableForSaleSecuritiesLiabilitiesFixedIncomeRegisteredInvestmentCompaniesFairValueDisclosure" id="kwr_AvailableForSaleSecuritiesLiabilitiesFixedIncomeRegisteredInvestmentCompaniesFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="OtherLiabilitiesFixedGeneralAccountFairValueDisclosure" id="kwr_OtherLiabilitiesFixedGeneralAccountFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="InterestRateDerivatives" id="kwr_InterestRateDerivatives" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="OtherLiabilitiesAcquisitionRelatedConsiderationFairValueDisclosure" id="kwr_OtherLiabilitiesAcquisitionRelatedConsiderationFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="FairValueMeasurementWithUnobservableInputsReconciliation" id="kwr_FairValueMeasurementWithUnobservableInputsReconciliation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityUnrealizedGain" id="kwr_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityUnrealizedGain" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="TotalChangeQuantitativeDisclosuresMember" id="kwr_TotalChangeQuantitativeDisclosuresMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ShareBasedCompensationLineItems" id="kwr_ShareBasedCompensationLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="BusinessAcquisitionContingentConsiderationActualCashPayment" id="kwr_BusinessAcquisitionContingentConsiderationActualCashPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="NpcoilHoldbackQuantitativeDisclosuresMemberMember" id="kwr_NpcoilHoldbackQuantitativeDisclosuresMemberMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ForeignCurrencyExchangeRateChanges" id="kwr_ForeignCurrencyExchangeRateChanges" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="InflationaryPercentage" id="kwr_InflationaryPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="EffectOfCurrencyConversionPerDilutedShare" id="kwr_EffectOfCurrencyConversionPerDilutedShare" type="num:perShareItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="OtherComprehensiveIncomeLossBeforeReclassifications" id="kwr_OtherComprehensiveIncomeLossBeforeReclassifications" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="ReclassificationsFromAccumulatedComprehensiveIncomeLossToIncomeStatement" id="kwr_ReclassificationsFromAccumulatedComprehensiveIncomeLossToIncomeStatement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="StatutoryTaxRate" id="kwr_StatutoryTaxRate" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="TinPlatingTechnologyMember" id="kwr_TinPlatingTechnologyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="EquityMethodInvesteeNameKelkoVenezuelaMember" id="kwr_EquityMethodInvesteeNameKelkoVenezuelaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="BusinessCombinationFairValueOfEquitytransfered" id="kwr_BusinessCombinationFairValueOfEquitytransfered" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="EffectOfTaxRateChange" id="kwr_EffectOfTaxRateChange" type="num:perShareItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="EffectOfCurrencyConversionAmount" id="kwr_EffectOfCurrencyConversionAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="VatAssessmentMember" id="kwr_VatAssessmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ProceedsFromNonIncomeTaxRefunds" id="kwr_ProceedsFromNonIncomeTaxRefunds" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="PrimexMember" id="kwr_PrimexMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="NonDomesticMember" id="kwr_NonDomesticMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="EngineeredCustomLubricantsMember" id="kwr_EngineeredCustomLubricantsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="LossContingencyPeriodIncreaseHighEnd" id="kwr_LossContingencyPeriodIncreaseHighEnd" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="LossContingencyPeriodIncreaseLowEnd" id="kwr_LossContingencyPeriodIncreaseLowEnd" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="VatTotalMember" id="kwr_VatTotalMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ScheduleOfForeignCurrencyLineItems" id="kwr_ScheduleOfForeignCurrencyLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ScheduleOfForeignCurrencyExchangeTable" id="kwr_ScheduleOfForeignCurrencyExchangeTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ForeignCurrencyExchangeMechanismAxis" id="kwr_ForeignCurrencyExchangeMechanismAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ForeignCurrencyExchangeMechanismDomain" id="kwr_ForeignCurrencyExchangeMechanismDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="CadiviMember" id="kwr_CadiviMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="SimadiMember" id="kwr_SimadiMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="TotalAcquisitionsMember" id="kwr_TotalAcquisitionsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="VerkolSAMember" id="kwr_VerkolSAMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="YearEndDecember312018Member" id="kwr_YearEndDecember312018Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="Year2018Member" id="kwr_Year2018Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="Documentandentityinformationabstract" id="kwr_Documentandentityinformationabstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="DiproMember" id="kwr_DiproMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="DicomMember" id="kwr_DicomMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="Businesscombinationrecognizedidentifiableassetsacquiredandliabilitiesassumedgross" id="kwr_Businesscombinationrecognizedidentifiableassetsacquiredandliabilitiesassumedgross" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="MiningNorthAmericaMember" id="kwr_MiningNorthAmericaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="UnrecognizedTaxBenefitsInterestIncomeOnIncomeTaxes" id="kwr_UnrecognizedTaxBenefitsInterestIncomeOnIncomeTaxes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="UnrecognizedTaxBenefitsIncomeTaxPenaltiesIncome" id="kwr_UnrecognizedTaxBenefitsIncomeTaxPenaltiesIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="TotalAcquisitions2Member" id="kwr_TotalAcquisitions2Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="PensionAndPostRetirementBenefitCostsNonserviceComponents" id="kwr_PensionAndPostRetirementBenefitCostsNonserviceComponents" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="Effectofcombinationrelatedexpensesperdilutedshare" id="kwr_Effectofcombinationrelatedexpensesperdilutedshare" type="num:perShareItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="Totalacquistions3memberMember" id="kwr_Totalacquistions3memberMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="TrademarksFomrulationsAndProductTechnologyMember" id="kwr_TrademarksFomrulationsAndProductTechnologyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="Combinationrelatedexpensesnetofpayements" id="kwr_Combinationrelatedexpensesnetofpayements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="HoughtonCombinationMember" id="kwr_HoughtonCombinationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="CustomerconcentrationrisktopfivemembermemberMember" id="kwr_CustomerconcentrationrisktopfivemembermemberMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="PrimarymetalsMember" id="kwr_PrimarymetalsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MetalworkingandotherMember" id="kwr_MetalworkingandotherMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="CoatingsandotherMember" id="kwr_CoatingsandotherMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="Ustaxreformact" id="kwr_Ustaxreformact" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="DebtInstrumentMaturityYear" id="kwr_DebtInstrumentMaturityYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="IndustrialDevelopmentRevenueBond" id="kwr_IndustrialDevelopmentRevenueBond" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="IndustrialDevelopmentBondDue2018MemberMember" id="kwr_IndustrialDevelopmentBondDue2018MemberMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="CurrencyConversionImpactsOfHyperInflationaryAccounting" id="kwr_CurrencyConversionImpactsOfHyperInflationaryAccounting" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="ArgentinaSubsidiaryMember" id="kwr_ArgentinaSubsidiaryMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="VenezuelaSubsidiaryMember" id="kwr_VenezuelaSubsidiaryMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="FacilitiesvehiclesandmachineryandequipmentMember" id="kwr_FacilitiesvehiclesandmachineryandequipmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="Definedbenefitplandescriptionofnatureofeventresultingincontractualterminationbenefitstoberecognizedinfutureperiod" id="kwr_Definedbenefitplandescriptionofnatureofeventresultingincontractualterminationbenefitstoberecognizedinfutureperiod" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="OldlineofcreditmemberMember" id="kwr_OldlineofcreditmemberMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MulticurrencyRevolverMember" id="kwr_MulticurrencyRevolverMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="UsTermLoanMember" id="kwr_UsTermLoanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="EuroTermLoanMember" id="kwr_EuroTermLoanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="DebtinstrumentidrbMember" id="kwr_DebtinstrumentidrbMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="UsTermLoanBorrowings" id="kwr_UsTermLoanBorrowings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="EuroTermLoanBorrowings" id="kwr_EuroTermLoanBorrowings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="Debtinstrumentidrb" id="kwr_Debtinstrumentidrb" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="LineOfCreditRemainingBorrowingCapacity" id="kwr_LineOfCreditRemainingBorrowingCapacity" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="DebtIssuanceCostCapitalization" id="kwr_DebtIssuanceCostCapitalization" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="BankLinesOfCreditAndOtherDebtObligationsMember" id="kwr_BankLinesOfCreditAndOtherDebtObligationsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="InterestExpenseBeforeamortizationOfDebtIssuanceCosts" id="kwr_InterestExpenseBeforeamortizationOfDebtIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="Lineofcreditfacilityinitiationdatedescription" id="kwr_Lineofcreditfacilityinitiationdatedescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="LineofCreditinceasedbyamount" id="kwr_LineofCreditinceasedbyamount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="GlobalSpecialtyBusinessesMember" id="kwr_GlobalSpecialtyBusinessesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="FairValueStepUpOfHoughtonInventorySold" id="kwr_FairValueStepUpOfHoughtonInventorySold" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="TotalSalesWithGlobalSpecialtyBusinessesMember" id="kwr_TotalSalesWithGlobalSpecialtyBusinessesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="TotalSalesWithoutGlobalSpecialtyBusinessesMember" id="kwr_TotalSalesWithoutGlobalSpecialtyBusinessesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="LegacyQuakerMember" id="kwr_LegacyQuakerMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="Stockissuedduringperiodvalueandadjustmentstoadditionalpaidincapitalsharebasedcompensationandexerciseofstockoptionsduetocombination" id="kwr_Stockissuedduringperiodvalueandadjustmentstoadditionalpaidincapitalsharebasedcompensationandexerciseofstockoptionsduetocombination" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="RightOfUseLeaseAsset" id="kwr_RightOfUseLeaseAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="Investmentinassociatedcompaniesacquired" id="kwr_Investmentinassociatedcompaniesacquired" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="MiningNorthAmericaTrademarksFormulationsAndProductTechnologyMemberMember" id="kwr_MiningNorthAmericaTrademarksFormulationsAndProductTechnologyMemberMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="Debtrelatedexpensesininterestexpensenettabletextblock" id="kwr_Debtrelatedexpensesininterestexpensenettabletextblock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="Pensiontabletextblock" id="kwr_Pensiontabletextblock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
</schema>
