改性ZSM-5沸石上酮醇脱水反应的分析

《改性ZSM-5沸石上酮醇脱水反应的分析》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、AbstractC【，lB-unsaturatedketonesexhibitgoodreactionperformanceandoftenusedasprecursorcompoundsorkeyintermediatesinorganicsynthesis．Manyimportantcompoundscanbesynthesizedthrough仅，lB-unsaturatedketones．Inrecentyears，themainsunthesisofa，I]-unsaturatedketoneisbythemethodoforga

2、nicsynthesis．Thegas··solidphasecatalyticdehydrationof4-hydroxyl··3·-hexenewasfirststudiedinthisPaper·Thisstudyusedsolidacidasthecatalyst，andthroughthecatalystselection，modificationandoptimizationexperimenttoimprovethereactionconversionandselectivity．Themainresearchcontents

3、andtheconclusionsarelistedasfollows：1．Throughthedifferentsolidacidcatalystcomparison，wefoundthatHZSM-5activitywashighestunderthesamecondition．ThroughcatalysticperformancecomparisonofH—catalysts，wefoundthatHZSM-5WassuperiortoH-X，H-YandH-D．Thismaybeassociatedwiththestructure

4、ofcatalysts，H-XandH-Ytypemolecularsievetofaujasitewithcagestructure，H-Dtypemolecularsievewithtwo．dimensionalchannelstructure，andHZSM·5belongstoorthorhombicsystem，itsbasicstructureunitconsistsofeightfive-memberedrings，withthreedimensionalflamestructure，itmaybeconducivetothe

5、reaction．2．Na2C03solutionimpregnationmodifiedHZSM-5catalystsamples，withtheincreaseofconcentrationofNa2C03，4-hydroxy-3-hexanoneconversionratereduced，aswellas4-hexene．3．ketoneselectivity．TheNH3一TPDapplicationofNa2C03solutionimpregnationmodifiedHZSM-5catalystsamples．Strongaci

6、dandweakacidcenterweremovinginthedirectionoflowtemperature，acidamountWasreduced，itshowedthatthetotalacidcatalystWasbeneficialtotheimprovementoftheconversionrate，moderateacidwasbeneficialtotheimprovementoftheselectivity．3．Usingdifferentmetalsion-exchangeprepareZSM-5catalyst

7、samples，thecatalyticproformanceexperimentsshowedthation-modifiedcatalystsamplesthehighestconversionrateandyieldofthecorrespondingreactiontemperatureweremovinginthedirectionofhightemperature，andthemodifiedsampleshadslightlylowerconversionandselectivitythanunmodifiedcatalyst

8、，SOmetalion-modifieddidnotimprovetheperformanceofthecatalyst．4．Thebestprocessofcatalyticr