isobaric vapor-liquid equilibrium for the acetonitrile + water system containing different ionic liquids at atmospheric pressure英

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1、JournalofChemical&EngineeringDataArticleJournaloff?ichemical&pubs.acs.org/jced门engineringdataIsobaricVapor-LiquidEquilibriumfortheAcetonitrile+WaterSystemContainingDifferentIonicLiquidsatAtmosphericPressureJingFang,*JingLiu,ChunliLi,andYanwenLiuSchoolofChemicalEnginee

2、ring,HebeiUniversityofTechnology,Tianjin,,ChinaABSTRACT:Isobaricvapor-liquidequilibrium(VLE)datafortheacetonitrile+watersystemcontainingionicliquids(ILs)atatmosphericpressure(101.3kPa)weremeasured.Theionicliquidsinvestigatedwere1-butyl-3-methylimida-zoliumtetrafluorob

3、orate([Bmim][BF4]),1-butyl-3-methylimi-dazoliumdibutylphosphate([Bmim][DBP]),and1-butyl-3-methylimidazoliumchloride([Bmim][Cl]).Theresultsshowedthat[Bmim][BF4]wasineffectivetotheenhancementofrelativevolatilityoftheacetonitrile+watersystem.[Bmim][DBP]and[Bmim][Cl]could

4、increasetherelativevolatilityofacetonitrileinthewholeconcentrationrangeandeliminatetheazeotropicpoint.TheseparationabilityofILswas[Bmim][Cl]>[Bmim][DBP].VLEdatafortheacetonitrile+water+ILsystemswerecorrelatedbythenonrandomtwo-liquid(NRTL)model.TheNRTLmodelwasapplicabl

5、etothecorrelationofILscontainingsystemswiththeaveragedeviationbeing5.17%.#dx.doi.org/10.1021/jeIJ.Chem.Eng.Data2013,58,1483—1489JournalofChemical&EngineeringDataArticle#dx.doi.org/10.1021/jeIJ.Chem.Eng.Data2013,58,1483—1489JournalofChemical&EngineeringDataArticleasfol

6、lows:BF4_[Bmim][BF4]1.INTRODUCTIONExtractivedistillationandsaltdistillationwerewidelyusedintheseparationofazeotropicorclose-boilingmixtures.However,theorganicsolventinextractivedistillationdemandedhighenergy,andthesaltdistillationrequiredhigh-qualityequipment.1,2Inre

7、centyears,ionicliquids(ILs)attractedconsiderableattentionfortheirpotentialuseasanentrainerintheseparationofazeotropicorclose-boilingmixtures.3-5ILsasanewkindofsolventhavemanyuniqueattributes,forexample,negligiblevaporpressure,goodthermalstability,andenvironmentalfrie

8、ndliness,whichmakethemattractiveandgivethempotentialforuseasasuitablesolventinspecialdistillationprocesses.Therefore,manyres