沸石分子筛用于异丙苯生产研究

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1、大连理工大学硕士学位论文沸石分子筛用于异丙苯生产研究姓名：陈兴伟申请学位级别：硕士专业：工业催化指导教师：刘靖20090601沸石分子筛羽于暴雨苯生产研究TheResearchofZeoliteintheIsopropylbenzeneProductionAbstractIsopropylbenzene(IPB)，oneofthelargestcommercialvolumederivativesofbenzene，isallimportantintermediateintheproductionofphenolandacetone，acetophenone，and(It．meth

2、y-1styrene．TraditionalSPA(solidphosphoricacid)andFriedal—Crafis(A1C13)processfoetheindustrialproductionofcumenesufferfromavarietyofproblems，suchashi曲environmentaleontaminationandcorrosion，Sincecommercializationofcumeneprocessesbasedonzeolitesin1990s，muchefforthasbeenputintodevelopingmoreenviro

3、nmentallyfriendlyandmoree缳cientzeolite-basedprocesses，whichcallproduceisopropylbenzeneatlowmolarratioofbenzenetopropylene．Inthepresentwork，wepresentacomparsionoftheperformanceofBetazeolitewithMCM．22zeoliteintheisopropylbenzeneproduction。MCM．22behavcshigherstabilityinthealkylationreactionatlOWt

4、emperatureandlOWfeedratioofbenzenetopropylenethanBetazeolite。HoweveritsactivityandstabilityaremuchlowerthanBetazeolteinthetransalkylationreactionofdiisopropylbenzene(DIPBs)andbenzene，meanwhilethemolarratioofn．propylbenzetoisopropylbenzeoverMCM．22zeoliteiS2．5timesasthat．overBetazeolite．MoldedBe

5、tacatalystinthelaboratorybehaveshighactivityandlonglifetimeinthealkylationreactionofbenzenewithpropylene，andthemolarratioofn-propylbenzetoisopropylbenzeisabout150ppm．Butinthetransalky’lationreactionofdiisopropylbenzeneandbenzene；themolarratioiSupto9000ppm。弧omolarratioofn-propylbenzenetoisoprop

6、ylbenzenecallfallto300ppmovercatalystsmodifiedwithA&Zr，Ce，hoxidesatthelittleexpenseofthediisopropylbenzeneconversion．ItmustbepointedoutthatBetazeolitecatalystinindustrialscale，whichiSwassynthesizedaccordingtothelaboratorpatenttechnologyshowssilimaralkylationreactionactivitywiththeimportedcatal

7、yst．CitricacidtreatmentCanwashawaymorphousmaterialsbetweenBetazeolitepartielesanddredgechannel，SOthemodifiedBetazeoliteshavebetterstabilitythanunmodifiedsampleinthealkylationreaction，andtherearea1ittleincreaseofcontentofn-propylbenzene．