介孔固体超强酸so42-xc的制备 结构及其催化合成水杨酸正丁酯的研究.docx

《介孔固体超强酸so42-xc的制备 结构及其催化合成水杨酸正丁酯的研究.docx》由会员分享，可在线阅读，更多相关《介孔固体超强酸so42-xc的制备 结构及其催化合成水杨酸正丁酯的研究.docx（2页珍藏版）》请在第壹文秘上搜索。

1、介孔固体超强酸so42-xc的制备结构及其催化合成水杨酸正丁酯的探讨汕头高校工学硕士学位论文万方数据AbstractMesoporousSo1.idSuperacidsSO42-XC(X-A1、Zr、SiZr,Jmontmori1.Ionite、rectorite)hadbeenpreparedandusedasnewcata1.ystsinthesynthesisofn-buty1.sa1.icy1.ate.Varioustechniques,suchasHammettindicator,NH3-TPD,Py-IK,XRD,BET,TG,DTAandIR,hadbeenusedtochara

2、cterizesamp1.es.Onthebasisofcharacterization,thereactionconditionforpreparationn-buty1.sa1.icy1.ate,propertiesandstructureofpi1.1.aredc1.ayshadbeeninvestigated.Theresu1.tsshowedthat:Theproperpreparationconditionsofcata1.ystsSO42-/XCfo1.1.owed:SiZrwas2-pi1.1.aringagent,acce1.erantwas(NH4)2SO4,m(SO4)m

3、(c1.ay)was30%,thetemperatureofca1.cinationwas500,andn(SiZr)/m(c1.ay)was3.5mmo1.g.Cata1.ystsSO42/SiZrCexhibitedhighcata1.yticactivityandgoodcata1.yticstabi1.ityinthesynthesisofn-buty1.sa1.icy1.ate.Forexamp1.e,theconversionofacidamountedto88.22%overcata1.ystSO42/SiZrM,and86.85%overcata1.ystSO42/SiZrR,

4、thecata1.yticse1.ectivityamountedto99.9%and99.5%,theconversionofacidon1.ydecreasedby5.33%and1.98%afterfivetimescontinuousreaction.Hanmettindicator,NH3-TPDandPy-IRmeasurementsindicatedthatcata1.ystsSO42-/ZrC(500C)andSO42-/SiZrC(500aC)weresuperacids.Thetypeofsuperacidbe1.ongedto1.ewisacidcenter,anda1.

5、sowastheactivitycenterofesterfication.XRDandBETmeasurementsindicatedthatthepi1Iaringagentsfixedintheinter1.ayerregionofc1.aysbychemica1.bond,anda1.soincreasedbasa1.spacingandsurfacearea.Whentheca1.cinationtemperatureincreased,thebasa1.spacingandsurfaceareadec1.ined.Aftercross-inked,thescopeofPI1.Caperturewasnarrow,especia1.y,theapertureofcata1.ystSO42-/SiZrR(100oC)wasaround2.3nm,anditwaspartofMesoporousMateria1.s.ThedosageofSO42-wasincreased,thebasa1.spacingandsurfaceareadec1.ined.Thebasa1.spacingofSO42-/XRwashigherthanthatofSO42-XM,whi1.esurfaceareatookonacon.