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  <xs:element id="ngvt_BuildingsAndLeaseholdImprovementsMember" abstract="true" name="BuildingsAndLeaseholdImprovementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_CustomerContractsAndRelationshipsMember" abstract="true" name="CustomerContractsAndRelationshipsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_FiniteLivedIntangibleAssetsRetirements" abstract="false" name="FiniteLivedIntangibleAssetsRetirements" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_FiniteLivedIntangibleAssetsAccumulatedAmortizationRetirements" abstract="false" name="FiniteLivedIntangibleAssetsAccumulatedAmortizationRetirements" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_FiniteLivedIntangibleAssetsAccumulatedAmortizationForeignCurrencyTranslation" abstract="false" name="FiniteLivedIntangibleAssetsAccumulatedAmortizationForeignCurrencyTranslation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_FiniteLivedIntangibleAssetsAccumulatedAmortizationImpairment" abstract="false" name="FiniteLivedIntangibleAssetsAccumulatedAmortizationImpairment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_PerformanceChemicalsMember" abstract="true" name="PerformanceChemicalsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_FinanceLeaseObligationsMember" abstract="true" name="FinanceLeaseObligationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_SecuritizationDebtReceivableMember" abstract="true" name="SecuritizationDebtReceivableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_OtherDebtMember" abstract="true" name="OtherDebtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_A2028SeniorNotesMember" abstract="true" name="A2028SeniorNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_TermLoanMember" abstract="true" name="TermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_DebtInstrumentCovenantComplianceLeverageRatio" abstract="false" name="DebtInstrumentCovenantComplianceLeverageRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="ngvt_DebtInstrumentCovenantCompliancePotentialLeverageRatio" abstract="false" name="DebtInstrumentCovenantCompliancePotentialLeverageRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="ngvt_DebtInstrumentCovenantComplianceInterestRatio" abstract="false" name="DebtInstrumentCovenantComplianceInterestRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="ngvt_DebtInstrumentCovenantComplianceActualLeverageRatio" abstract="false" name="DebtInstrumentCovenantComplianceActualLeverageRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="ngvt_StockRepurchasedDuringPeriodIncludingExciseTaxValue" abstract="false" name="StockRepurchasedDuringPeriodIncludingExciseTaxValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_StockRepurchasedDuringPeriodExciseTax" abstract="false" name="StockRepurchasedDuringPeriodExciseTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_OtherIncomeExpensesChargesNet" abstract="false" name="OtherIncomeExpensesChargesNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_EmployeeSeveranceAndOtherEmployeeRelatedCostsMember" abstract="true" name="EmployeeSeveranceAndOtherEmployeeRelatedCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_OtherChargesIncomeMember" abstract="true" name="OtherChargesIncomeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_AssetDisposalChargesMember" abstract="true" name="AssetDisposalChargesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_RepositioningCosts" abstract="false" name="RepositioningCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_RestructuringMember" abstract="true" name="RestructuringMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_RestructuringSeveranceAndOtherEmployeeRelatedCostsMember" abstract="true" name="RestructuringSeveranceAndOtherEmployeeRelatedCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_OtherIncomeChargesNetMember" abstract="true" name="OtherIncomeChargesNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_RestructuringAndOtherIncomeChargesImpactOnTaxes" abstract="false" name="RestructuringAndOtherIncomeChargesImpactOnTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_GainLossOnSaleOfBusinessImpactOnTaxes" abstract="false" name="GainLossOnSaleOfBusinessImpactOnTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_LongLivedAssetImpairmentChargeImpactOnTaxes" abstract="false" name="LongLivedAssetImpairmentChargeImpactOnTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_GoodwillImpairmentImpactOnTaxes" abstract="false" name="GoodwillImpairmentImpactOnTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_GainLossOnStrategicInvestmentsImpactOnTaxes" abstract="false" name="GainLossOnStrategicInvestmentsImpactOnTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_ImpairmentOfLicenseAgreementImpactOnTaxes" abstract="false" name="ImpairmentOfLicenseAgreementImpactOnTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_LitigationChargeImpactOnTaxes" abstract="false" name="LitigationChargeImpactOnTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_ProxyContestChargesImpactOnTaxes" abstract="false" name="ProxyContestChargesImpactOnTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_PortfolioRealignmentCostsImpactOnTaxes" abstract="false" name="PortfolioRealignmentCostsImpactOnTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_OtherTaxOnlyDiscreteItemsImpactOnTaxes" abstract="false" name="OtherTaxOnlyDiscreteItemsImpactOnTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_DiscreteAdjustmentsImpactOnTaxes" abstract="false" name="DiscreteAdjustmentsImpactOnTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_IncomeLossfromContinuingOperationsbeforeIncomeTaxesNoncontrollingInterestBeforeDiscreteAdjustments" abstract="false" name="IncomeLossfromContinuingOperationsbeforeIncomeTaxesNoncontrollingInterestBeforeDiscreteAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_TaxEffectAbstract" abstract="true" name="TaxEffectAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ngvt_RestructuringAndOtherIncomeChargesImpactOnTaxesTax" abstract="false" name="RestructuringAndOtherIncomeChargesImpactOnTaxesTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_GainLossOnSaleOfBusinessTax" abstract="false" name="GainLossOnSaleOfBusinessTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_LongLivedAssetImpairmentChargeTax" abstract="false" name="LongLivedAssetImpairmentChargeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_GoodwillImpairmentTax" abstract="false" name="GoodwillImpairmentTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_GainLossOnStrategicInvestmentsTax" abstract="false" name="GainLossOnStrategicInvestmentsTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_ImpairmentOfLicenseAgreementTax" abstract="false" name="ImpairmentOfLicenseAgreementTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_LitigationChargeTax" abstract="false" name="LitigationChargeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_ProxyContestChargesTax" abstract="false" name="ProxyContestChargesTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_PortfolioRealignmentCostsTax" abstract="false" name="PortfolioRealignmentCostsTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_OtherTaxOnlyDiscreteItemsTax" abstract="false" name="OtherTaxOnlyDiscreteItemsTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_DiscreteAdjustmentsTax" abstract="false" name="DiscreteAdjustmentsTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_IncomeLossfromContinuingOperationsbeforeIncomeTaxesNoncontrollingInterestBeforeDiscreteAdjustmentsTax" abstract="false" name="IncomeLossfromContinuingOperationsbeforeIncomeTaxesNoncontrollingInterestBeforeDiscreteAdjustmentsTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_EstimatedEffectiveIncomeTaxRate" abstract="false" name="EstimatedEffectiveIncomeTaxRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ngvt_BASFLawsuitMember" abstract="true" name="BASFLawsuitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_NumberOfClaimsForViolationsOfUSAntitrustLaw" abstract="false" name="NumberOfClaimsForViolationsOfUSAntitrustLaw" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ngvt_EarningsBeforeInterestTaxDepreciationAndAmortization" abstract="false" name="EarningsBeforeInterestTaxDepreciationAndAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_DepreciationAndAmortizationAdjusted" abstract="false" name="DepreciationAndAmortizationAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_RestructuringAndOtherExpenseIncomeNet" abstract="false" name="RestructuringAndOtherExpenseIncomeNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_GoodwillImpairmentLossAdjusted" abstract="false" name="GoodwillImpairmentLossAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_GainLossOnSaleOfStrategicInvestment" abstract="false" name="GainLossOnSaleOfStrategicInvestment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_PortfolioRealignmentCostsAdjusted" abstract="false" name="PortfolioRealignmentCostsAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_IndirectCostsAllocatedToDivestiture" abstract="false" name="IndirectCostsAllocatedToDivestiture" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_PaymentsToAcquireProductiveAssetsAdjusted" abstract="false" name="PaymentsToAcquireProductiveAssetsAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_GroundLeaseMember" abstract="true" name="GroundLeaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_PlantOperationsMember" abstract="true" name="PlantOperationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_IndustrialSpecialtiesDivestitureMember" abstract="true" name="IndustrialSpecialtiesDivestitureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_PerformanceChemicalsRoadMarkingsProductLineMember" abstract="true" name="PerformanceChemicalsRoadMarkingsProductLineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ngvt_DiscontinueOperationsServicesAgreementTerm" abstract="false" name="DiscontinueOperationsServicesAgreementTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ngvt_DisposalGroupIncludingDiscontinuedOperationNonCompeteObligationPeriod" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationNonCompeteObligationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ngvt_SaleLeasebackTransactionLeaseRenewalTermOptions" abstract="false" name="SaleLeasebackTransactionLeaseRenewalTermOptions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ngvt_SaleLeasebackTransactionLeaseRenewalTerm" abstract="false" name="SaleLeasebackTransactionLeaseRenewalTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ngvt_DisposalGroupIncludingDiscontinuedOperationResearchAndTechnicalExpenses" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationResearchAndTechnicalExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_DisposalGroupIncludingDiscontinuedOperationRestructuringAndOtherIncomeChargesNet" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationRestructuringAndOtherIncomeChargesNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_DisposalGroupIncludingDiscontinuedOperationGainLossOnSaleOfBusiness" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationGainLossOnSaleOfBusiness" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_DisposalGroupIncludingDiscontinuedOperationOtherExpenseIncome" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationOtherExpenseIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_DisposalPurchasePriceAdjustment" abstract="false" name="DisposalPurchasePriceAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_InventoryLIFOCustomaryPurchasePriceAdjustment" abstract="false" name="InventoryLIFOCustomaryPurchasePriceAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_DisposalGroupIncludingDiscontinuedOperationsOperatingLeaseAssetsNet" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationsOperatingLeaseAssetsNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_DisposalGroupIncludingDiscontinuedOperationAccruedPayrollAndEmployeeBenefits" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationAccruedPayrollAndEmployeeBenefits" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilitiesCurrent" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilitiesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilitiesNoncurrent" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilitiesNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngvt_DisposalGroupIncludingDiscontinuedOperationLIFOReserve" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationLIFOReserve" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
