關(guān)于鹽效應(yīng)及其在分離過程中的應(yīng)用的研究.pdf

1、天津大學(xué)博士學(xué)位論文關(guān)于鹽效應(yīng)及其在分離過程中的應(yīng)用的研究姓名：潘曉梅申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：分離工程指導(dǎo)教師：楊志才20021201ABCTRACTSevernfieldsofsalteffectWaSstudiedbytheoreticalanalysisandexperimenttomeettheneedofseparationtaskinchemicalengineeringprocessTheyare：Saltselectio

2、n；SalteffectonVLEandLLE；“SaltDistillation—SaltExtraction’combinedseparationprocessForabinarysystem，sincegeneralinteractionbetweenasaltandasolventWaSexpressedbytheproductoftheeffectforcekbetweenthesaltandthesolvent，whichc

3、omesfromthecorrelationoftheexperimentdataofdepressingofvaporpressureofsolutionwithsalt，andthesolubilityofthesaltS’inthesolvent，SOforabinarysolutionthecriteriaofsaltselectionWaSdescribedasthedifferenceofthegeneralinteract

4、ionbetweenasaltandtwosolventsinthesolution，thatis：V=lks2占2一ksl黽ITwokindsofmodelsincorrelationofdataofVLEandLLEofbinarysystemundersalteffectwereofferedAsforVLEthefirstl[indofmodeIisbaSedonFurterequationTheTWilsonequationw

5、asintroducedandmodifiedtodescribebinarysystemVLEtheoretically，whichbelongstothesecondkindmodelAsforLLE，thefirstkindofmodelis：也edifferenceofthedistributioncoe伍cientbeforeandafteraddingsalttothesolutionWaScorrelatedwithsal

6、tconcentrationinwaterlayernlesecondkindofmodelis：electrolyteNRTL(MNRTL)modelwasusedtocalculateLLEdatatheoreticallyIngeneralthefirstkindofmethodsaresimpleandmeaningful，andthesecondkindofmodelsaremoreaccurateandusefulinpro

7、cesssimulationAnewprocesscombiningazeotropedistillationandsaltextractionthatpurifiestheorganicsolventfromtheirazeotropeswitllwaterWasprecededAnoveltower、ⅣimasaltextractorandamiddlevesselWaSproposedWaterCanbegotawaybothfr

8、ombosomandoverheadoftoweratthesalTletime，andtheorganicsolventwasconcentratedinthetowerandaccumulatedinthemiddlevesselatlastSotheprogresswastime—shortedandenergysavedandtheconcentrmionofproductWaSupto999％andtheproductyiel

9、d995％ThenewprocessWaSstudiedexperimentallyandsimulatedbyconstantmolarholdupmodelAtlast，recoveryofsaltfromitsaqueouswasstudiedby“extractivecrystallization”processKeywords：saltextraction；middlevessel；azeotrope；acetonitrile