新型復(fù)配型碳基固體酸的制備及催化應(yīng)用.pdf

1、獨(dú)創(chuàng)性聲明本人聲明所呈交的論文是我個(gè)人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作及取得的研究成果。盡我所知，除了文中特別加以標(biāo)注和致謝的地方外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過(guò)的研究成果，也不包含為獲得寧夏大學(xué)或其它教育機(jī)構(gòu)的學(xué)位或證書而使用過(guò)的材料。與我一同工作的同志對(duì)本研究所做的任何貢獻(xiàn)均己在論文中作了明確的說(shuō)明并表示了謝意。研究生簽名：酯辮oJ時(shí)問(wèn)：年月同關(guān)于論文使用授權(quán)的說(shuō)明本人完全了解寧夏大學(xué)有關(guān)保留、使用學(xué)位論文的規(guī)定，即：學(xué)校有權(quán)保留送

2、交論文的復(fù)印件和磁盤，允許論文被查閱和借閱，可以采用影印、縮印或掃描等復(fù)制手段保存、匯編學(xué)位論文。同意寧夏大學(xué)可以用不同方式在不同媒體上發(fā)表、傳播學(xué)位論文的全部或部分內(nèi)容。(保密的學(xué)位論文在解密后應(yīng)遵守此協(xié)議)研究生簽名：甜新J14導(dǎo)師簽名：∥Jl，口‘刀良時(shí)間：年月R州日J(rèn)：沙噼廠月矽日AbstractNowadays，underthegreenrevolution，thesolidcatalystwasmoreattentionTh

3、eyhavemanyadvantages，suchasnon—toxic，inodorous，non—volatile，noncorrosive，nonpollution，mildreactionconditions，highyieldsandreactivity，excellentstabilityandsimplework—upprocedureSolidacidcatalystshavebeenfoundtobeuseRflcat

4、alystinvarietyoforganicreactions，andthesearewhatliquidcatalystscannotreplaceTherefore，itisnecessaryforLIStofindanewgreencatalystwhichhasgreatadaptabilityinawiderangeofrawmaterials，andwhichisfriendlytochemicalengineeringA

5、dditionallythisnewkindofresourceshouldimproveeconomicefficiencyInthispaperacompositecarbon—basedsolidacidcatalyst(CCS—SA)waspreparedbycelluloseandsodiumhumateascompoundcarbonsource，anditsstructurewascharacterizedexplorei

6、tscatalyticactivitiesThemainfruitsaresummarizedfollowing：Thefirstpartmainlyaimsatpreparationandcharacterizationofcompositecarbon—basedsolidacidcatalystCCS—SASomeeffectsonacidvalueofcompositecarbonbasedsolidacidcatalystwe

7、reinvestigatedsuchascarbonizedtemperature，carbonizedtime，sulfonationtemperature，sulfonationtime，amountofsulfuricacidandSOonTheappropriatepreparationconditionisthattake209compositecolophonytocarbonize8hunder400。C，thenlgca

8、rbonizedcompositedcolophonyand10mlsulfuricacid(98％)weremixedroundfor1Ohunder120。ContheconditionofnitrogonThecompositecarbonbasedsolidacidcatalystwascharacterizedbylR，XRD，BET，TGandothermethodsandtheirsurfaceacidityweredet

9、erminedbychemicaltitrationmethodTheresultsshowthat：Thecompositecarbon—basedsolidacidcatalystcontaining—S07H，an(jthereisawidedistributionofacid，acidvalueof122mmolg～：Itwasamorphouscarbonstructureandithadconsiderableheatsta

10、bilitybelow240℃Thesecondpart，UsingCCS—SAcatalyzedsynthesissomepropionateswasstudiedTheeffectingelementssuchastheamountofcatalyst，theratioofreactants，thereactiontime，aswellasotherfactorstotheyieldoftheproductswerestudiedT

11、heresultsindicatedthattheCCS—SAwasexcellentcatalystsforsynthesizingthesecompoundstheyieldswerebetween7615％and9048％Meanwhiletheuseofmicrowaveradiationsynthesisofbenzylpropionatetheyieldwasimprovedby15％thetimeofreactionwas

12、reducedmuchmoreundermicrowavethantraditionalheatingThethirdpart，CCSSAasanefficientcatalystforsynthesizingsomeacetals(ketals)undermicrowaveradiationFirst，usingethyleneglycolandbenzaldehydeasthereactionofmaterialstoinvesti

13、gatetheoptimalreactionconditions，thenundertheaboveoptimumconditions，thesubstratestructure(differentacetals／ketonesandvariousalcohols)onthereactionwereinvestigatedFinally，wesuccessfullyobtained14correspondingacetalsJ7keto

14、nesingoodyieldsThereactiontimewas10～30rain，andtheyieldrangedfrom639％940％Comparedwithreportedcatalysts，theCCSSAwascheap，easypreparation，littlecausiticity，easilyseparatedfromsystem，environmentfriendlyandcanbereusedforsever