资源描述：
《外文文献翻译：用混合溶剂萃取精馏分离乙腈-乙酸乙酯》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、Separationofacetonitrile-ethylacetatebyextractivedistillationwithmixedsolventLiChunli1,ZongLili2andFangJingSchoolofChemicalEngineering,HebeiUniversityofTechnology,Tianjin,30013E-mail:lichunli_hebut@126.com,Tel:+86-022-60202246AbstractComputer-aidedmolecularde
2、sign(CAMD)approachwasbringinthisworkforselectingextractivesolvents.Theseparationofacetonitrile-ethylacetateAzeotropicsystemwascarriedoutthroughabatchextractivedistillationprocesseswithN,N-dimethylformamide(DMF),glycol(EG)andDMF-EGmixtureassolventsseparately.T
3、heeffectsofdifferentoperatingconditionswerestudied,solvents,ratioofmixedsolvent,solventflowrateandrefluxratiowereallincluded.ItwasfoundthatthemixedsolventDMF-EGshowedbetterseparationeffectthanthesinglesolvent.Thebestproportionofthemixedsolventwas3:7(thequalit
4、yofDMFandEG);whenthesolventflowrateandrefluxratioincreased,theseparationeffectofmixedsolventimproved;undertheconditionsthatsolventflowratewas20mL/min,refluxratiowas2,qualityfractionofethylacetateinthetopproductcouldreach99.62%.KeywordsSeparation;Batchextracti
5、vedistillation;Mixedsolvents;Acetonitrile;Ethylacetate1.IntroductionAcetonitrileandethylacetatearewidelyusedinchemicalandpharmaceuticalindustriesaschemicalrawmaterialsandgoodorganicsolvent[1].Butthetwoformazeotrope,ethylacetatehold77%andtheother23%isacetonitr
6、ile(massfraction),commondistillationmethodcannotmakeanyeffect.Therefore,somecompanieshavetotreatthemaswaste,thisnotonlycauseseriouslywasteofresourcesandeconomy,butalsopollutetheenvironment.Atpresent,DiJiandong[2]ofTianjinuniversityhasrealizedtheseparationofac
7、etonitrile-ethylacetatebyheterogeneousbatchazeotropicdistillation,buttheproductreceivedinthiswayhavelowerpurity,buthighenergyconsumption.Accordingtothedifferenceofsolubilitythatacetonitrileandethylacetateinthewater,MaWenchan[3]adoptsthemethodofliquid-liquidex
8、tractivewhichusewaterasextractiveagenttoseparateacetonitrile-ethylacetate,theproductofethylacetatecanachieve98.5%,butacetonitrilemixedwithabundantwater,sorecoveryofacetonitrileisverydiffi
