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1、醋酸乙烯相關(guān)材料123123（Vinylacetaterelatedmaterial123123）ThisarticleiscontributedbyweihuahanjzvinylacetateVinylacetate(VAc)isoneofthe50mostimportantchemicalproductsintheworld.Itisanimportantorganicchemicalrawmaterial.Easypolymerization,polymerizationbyitselforw
2、ithothermonomers,mainlyusedintheproductionofpolyvinylacetate(PVAc),polyvinylalcohol(PVA),ethylenevinylacetatecopolymeremulsion(VAE)or(EVA)copolymerresin,vinylacetateandvinylchloridecopolymer(EVC),acetalresinderivatives.Theuseofthesederivativesisverywide
3、,canbeusedforfiber,adhesives,coatings,emulsifier,textilesizingandfinishingagent,film,safetyglass,watersolublefilm,soilimprovementagentandsoon,widelyusedinconstruction,machinery,automobile,textile,papermaking,packaging,printinganddyeing,printing,furnitur
4、e,cigaretteandotherdepartments.Withtheprogressofscienceandtechnology,newapplicationfieldsarestillexpanding.First,theproductionprocessofvinylacetate,vinylacetateproductionprocess,productionofvinylacetate,thereareusuallytworoutesofrawmaterials,ethyleneand
5、acetylene.Ethylenegasphaseethylenegasphasemethodiscurrentlyadoptedabroadmanymethods,theprocessofethylene,oxygenandaceticacidvaporinthenoblemetalPd-Au(orPt)catalystcatalystandpotassiumacetate,at100to200DEGC,0.6~0.8MPaundertheconditionofreactioninfixedbed
6、reactor.Thereactionproductsobtainedbyseparation,distillationofvinylacetate.Thekeydifferencebetweenthetwoprocesses,thatis,BayergasphasemethodandUSIgasphasemethod,isthatthecatalystisthecatalyst.Bayermethodhashighcatalyticactivityandtheyieldofspacetimeisab
7、outtwotimesofUSI.Theoperationconditionsaresevere,andthecatalystlifeisnotlongerthanthatofUSImethod,butgenerallymorethan1years.ThecatalystactivityofUSImethodishighwithoutBayerandlowinspacetime,buttheoperationconditionismildandcatalystlifeislonger.Thusitca
8、nbeseenthatBayermethodhasmoreadvantagesthanUSImethod.Therefore,theproductionofvinylacetatefromvariouscountriesintheworldadoptstheBayermethod.Atpresent,foreigncompaniessuchasBPandCelanesehaveoptimizedandimprovedonthebasisoftraditi
