简介:TheresultsofcommercialapplicationoftwotypesofC_8aromaticsisomerizationcatalystsunderdifferentfeedconditionswerecomparedtogainaninsightinthetechno-economicalbasisforselectingpropertechnologicalrouteattheplant.Thecomparisonrevealsdifferencesineveryaspectoffeedconsumption,unitcapacity,productoutput,productdistribution,andunitprocessparametersdependinguponwhichcatalysttypeisadoptedbytheintegratedPXcomplex.Thetypeofaromaticsisomerizationcatalysthasitsinfluenceontheplantscale,theconstructioncost,theprocessunitcapacityandtheproductcost,withthemagnitudeofitsimpactvaryingwithchangingfeedconditions.
简介:The^Siand^1Hhigh-resolutionliquid-phaseNMRhasbeenusedtoinvestigatethehydrolysisprocessofthetetraethylorthosilicate(TEOS).^1H-NMRspectroscopyshowsthatthehydrolysisofTEOSinTPAisfasterthaninTEA.TheimpactsofTPAandTEAontheTOEShydrolysisprocessanditshydrolyzedproductdistributionhavebeenobservedby^29Si-NMRrespectively.Theinfluencesofwaterandtheisopropylalcoholonhydrolysishavealsobeendiseussed.ThepresenceofTBOTmarksanevidentdifferentiationbetweenTPAandTEAforhydrolysisin^29Si-NMRspectra.
简介:Thisarticlereferstotheresultsofsmall-scaleandcommercialtestsonhigh-temperaturecrackingofC4fractioninFCCunittoincreasethepropyleneyield.ThebenchtestsrevealedthattheconversionrateofC4fractionduringhigh-temperaturecrackingreached37.38%andpropyleneyieldwasequalto15.60%withtheconversionrateofC4olefinsequatingaround50%.Theresultsofcommercialapplicationshowedthatadoptionofthetechnologyforhigh-temperaturecrackingofC4fractioninFCCunithadledtoanincreaseofpropyleneyieldby2.16%withnoremarkablechangesintheyieldsandpropertiesofotherproducts.
简介:Thispaperhasstudiedthevapor-liquidequilibrium(VLE)forthesalt-containingextractivedistillationofthe1-propanol/watersystem.BinaryVLEdataweremeasuredforthesystemsof1-propanol(1)/KAc(4),ethanediol(3)/KAc(4),and1-propanol(1)/ethanediol(3),withtheVLEdatacorrelatedwiththeNRTLmodelinordertoobtainthemodelparametersofthesebinarysystems.ThebinaryVLEdatacitedintechnicalliteraturewerecorrelatedtoobtainthemodelparametersforotherbinarysystems.VLEdataofternaryandquaternarysystemspredictedbytheNRTLmodelagreedwellwiththeliteraturedata.TheinfluenceofKAc,ethanediol,andtheKAc/ethanediolmixtureonvolatilitybetween1-propanolandwaterwasinvestigatedrespectively.Testresultsshowedthattheabove-mentionedmaterials(KAc,ethanediol)andtheirmixture(KAcandethanediol)havedifferentinfluenceonthevolatility.Whenx3=0.5,andx4=0.05,theazeotropicpointcanbeeliminated.TheNRTLmodelmethodofsalt-containingVLEissimpleandeffectiveforthepredictionofthesystem’sVLEdata.
简介:DuringJuneandJuly2003,JingmenPetrochemicalCompanycardedoutthecommercialtestontechnologyforhigh-temperaturecrackingofC5fractiontodecreaseolefincontentofgasolineinDCCU.ThetestresultsshowedthattheolefincontentofDCCgasolinehaddecreasedfrom68.32m%to42.5m%,meanwhilethepropyleneyieldincreasedby0.90m%.