CA及其改性膜用于C-,4~5-醚后產(chǎn)物滲透汽化脫醇的研究.pdf

1、浙江大學碩士學位論文CA及其改性膜用于C醚后產(chǎn)物滲透汽化脫醇的研究姓名：張林申請學位級別：碩士專業(yè)：化學工程指導(dǎo)教師：陳歡林劉茉娥2000.3.1＼AbstractPcrvaporationhasbeentheeffectiveandenergysavingmembraneseparationtechniquefordehydrationoforganicsInthefuture，thepervaporationprocessmaybe

2、becomeapotentialseparationtechniqueinpetrochemicalindustryinsteadofdistillationforseparationoforganicmixturesInthispaper，threekiridsofmembranes、CA，CAblendedwithCA／PVB(Polyvinylbutyral)andCA／AAco—MMA(Copolymerofacrylicaci

3、dmethylmethacrylate)，andCAmodifiedbyplasmawerepreparedandusedformethanolremovalfromorganicmixtureinethedficationprocessofC45Bystudyingonthesedifferentmembranesitwasexpectedtofindouttherulesofmembraneformationandtomakeexc

4、ellentmembranesFirstintheworkthesericsofcopolymersofAA—coM14Awerecopolymefisedwimdi舵rentcopolymercompositionandtlleirswellcharacteristicsweredeterminedindifferentsolventsTheresultsshowedthatthecopolymer、訪tllmonomerratio=

5、l：l：1waspartiallysolvablcinthesolventwhichthemethanolconcentrationwasbeyond10wt％andwasswolleninMTBEButithadnoeffectinCInaddition，forthemembranemadeofthecopolymerahighmethanolfluxandalowseparationfactorwereobtainedHowever

6、thecopolymerof2：2：lcouldbepartiallydissolvewhentheconcentrationofmethanolwashigherthan30wt％IthadnovarietyinMTBEandCJ～‘Themembranewiththiscopolymershowedhighmethanol—selectivityandIowpermeationforMTBE，Me0HThentheseparatio

7、nexperimentsofMTBE／MeOHmixturewerecarriedout、杭mCAmembranesblendedwithPVBandAA—coMMArespectivelyTheresultsshowedwhenthePVBconcentrationinmembranewas20w慨themethanolfluxandseparationfactorwas20timesthanthefluxofCAmembranean

8、dtheseparationfactorofPVBmembranerespectivelyAlsoforCA／AAcoMMAblendedmembrane，asimilarresultwasobtainedForbothofblendedmembranes，iftheweightfractionofPVBorAAcoMMAwasbetween20％to40％theefrectofpervaporationwasenhanced，andt

9、heconsistenceexperimentalsoshowedthattwomaterialsofablendedmembranewereconsistentwellItwasdeducedthat也epermeationorselectivityofablendedmembranewasbetweentwoextremumsoftwomembranespreparedwimtwosinglematerialsTherewereno

10、obviousimprovingforpervaporationcharacteristicsoftheCAmembranetreatedbylowtemperatureoxygenplasmaandtheCAmembranesgraRedMAandMMAbyplasmamethodFinallypervaporationseparationpropertiesforthreekindsCAmembraneshadbeenmeasure

11、dforMTBE／C?！疢e0Hternarysystem，andthreebinary—mixturesseparationThefluxandseparationfactorvariedwithoperationtemperatureandfeedconcentrationweredeterimedItwasfoundthatthepropertyofCAmaterialinfluencedtheperformancepervap

12、orationMoreovertlleresultrevealedthatmethanoItransportintheCAmembranewasimpededforMTBEinthemixtureandwiththeincreaseoftheMTBEfractionthefluxofmethanoldecreasedclearlvBasedonexperimentvaluesofCA，membranethemodeloftheterna

13、ry—mixturepervaporationfluxandquasiphaseequilibriumaboutcomposingofpermeationwasadvancedThecalculatevaluesagreedwithexperimentresultsItwasfoundthatthemodeIcouldbeusedforestimatingthepervaporationprocessofMTBE／Cd一‘／Me0Hte