USY分子筛上的二异丙苯烷基转移反应

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1、ABSTRACTTHETRANSALKYLATIONoFDllSOPROPYLBENZENoNTHEUSYZEoLITEInthisdissertation，thethermodynamicpropertiesofthereactionsystemalestudiedbasedontheknowledgeofthermodynamics．AseriesofUSYzeolitecatalystswererespectivelymodifiedbyNi13，MgandNH3一Mg．TheUSYsamplesbeforeandaftermodificationwerecharacterizedbyX

2、RD，BET,NH3-TPD，andNMR．ThecatalyticperformanceoftheUSYsampleswasinvestigatedontheiso-thermofixedreactor．TheresultsshowedthatNH3modificationcanmaintaintheUSYzeoliteframeworkstructure，atthesametime，effectivelyimprovethedistortionenvironmentofthefour-coordinatedframeworkaluminuminwhichthecrystallinityof

3、thecatalystWasincreased．AndwiththegrowthofNI-13modificationtime，USYzeolitemesoporousvolumewasincreased，poresizedistributionwaswidened．Furthermore，thesamplewithNH3modifiedfor6hsignificantlyincreasedtheacidityofzeoliteandtheconversionofdiisopropylbenzeneincreasedby10％，theselectivityofisopropylbenzenew

4、asincreasedfrom80．12％to86．14％．Byincipientimpregnationmethod，USYzeolitewasmodifiedbyM92+．ThequantityofMgloadedOilthezeoliteisO．15％，O．5％，1％oftheM92+．Thecatalystevaluationresultsshowthattheoptimalmodifiedconcentrationof111北京化工大学硕士学位论文magnesiumionisO．15。／o--O．5％．NH3andM92+modification，thecatalystevaluat

5、ionresultsshowedthattheconversionofdiisopropylbenznewasincreasedto86．89％，andthelifetimeofthecatalystinthestudytime(72hours)showedactivation．Usingsingle—factortest，inawiderangeofoperatingtemperature(140"(2-200"C)，benzeneanddiisopropylbenzenemolarratio(5：1～11：1)，thechangeoftheconversionandselectivityo

6、fthetransalky’lationreactionwasinvestigated．Theresultsshowthat：asthetemperatureincreased，theconversionofdiisopropylbenzeneandthecontentofn-propylbenzeneincreased，buttheselectivityofisopropylbenzenedecreased．Improvingthemolarratioofbenzene／diisopropylbenzeneisconducivetoenhancetheconversionandselecti

7、vity,butwhenthemolarratioismorethan9，theeffectofmolarratioontheconversionandselectivitysignificantlydecreased．Whenthelawmaterialcontainstriisopropylbenzene，theconversionofdiisopropylbenzenedecreased，a