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1、南京理工大学硕士学位论文2，4，6-三甲基苯甲醛合成与工艺研究姓名：杨光申请学位级别：硕士专业：应用化学指导教师：方志杰;张跃20060701'●“～_JI’’．曼主堡苎型受=三!苎苎里坠堕竺翌塞ABSTRACT2,4，6-trimethylbenzaktehyde(mes矗aJdehyde)isanovelfinalchemicalintermediate．Astheshortageofindusu'iali∞m栅叫kt啦technology,highpuritymesitaldehydeis9茂惭inthemarke
2、t．So，theresearchforthesynthesisofmeshakiehydeise懿圮miaLIndomesticandoverseas,therearemanysyntheticalmethods,includingincompleteoxidation,bromimtlonandhydro蛳Gl-ig∞rdreaction,usingzinccyanide，chloromethylatlonandhydrolyzation,reducingbenzoicacid．oxkIatmgbenzylalcoho
3、l,formylalionandSOOILInn霹鼯mcl呐theproductarecomplicated，theyieldislowandthecostishi血Weadoptmeansofformylationtosynthesizem骼妇I如hyde，usingm鼯it)riene、COandHCI∞thematerials,l，2-Chloroetbaneasthesolvent，Lewiseacid撼thecatalyst．nIistechnologyhassomemeritssuchaslowCOstofm
4、aterial,lowrequirementforreactioncondition,littlee41vironi删pollution．Comparedwithtechnicsandequipmemofdifferentsyntheticrouksfor2,4，6-trimethyibanzaldehyde．Lowtempe鞠lll心forn啦ionprocessw勰adopted'underspecialrcactofandmild托a吐ionconditions,theproductwasⅣel'啪dbyformy
5、htereactionofmesit3rlenewithCOandHCl,usingLewiseacidasthecatalyst,1,2-Odoroethaneasthesolvent．WemakeoutsinglefactorexperimemandoptimaltrialtOoptimizationcatalysissystemandtechnicsofthereaction,，Theinfluencefactorsonpurityoffinalproductwereinvestigatedindetail'sus
6、hascatalyst,reactiontimeandtcmpc卿慨Thesyntheticrouteandreagtionmechanismof2，4,6-trimethylbenzaldehydewe犯alsointroducedinthispsper．Aftera簧堍sofstableexperiment,theoptimalCOnditionsofsynthesiswere：mesitylene／AICl3／Cu2C12／1,2-CH2CICHzC
7、=I：2．0：0．21：2．o．reactiontime：18h
8、ours,temperature-25tO30"C，thesingle-pass-conversion啪reach80％一90‰andtheyieldreached59％．Variouselementweresepardtedbyrectification,theCOlltentoftbeaimed阳,ductreached98．5％bythe搬normalizationmethod,Theproductwas(k'terminatedbyNMR、IRandGC·MS．duringtheCOurseofreaction,
9、GCwasusedtOquantitativedetermination．Thismethodofformylatlonhassoftiemerits,mc姗ingabundantrawmaterials,mildreactionCOnditions,muchlessoftheCOntentofisomer．Atth
