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1、天津大學(xué)碩士學(xué)位論文固體酸催化合成富馬酸二甲酯姓名:宋志軒申請(qǐng)學(xué)位級(jí)別:碩士專(zhuān)業(yè):化學(xué)工程指導(dǎo)教師:姜忠義;張龍2000.11.1又律太學(xué)碩士掌位論文中文提要本論文研究了在麗體超強(qiáng)陵催化F,川寓弓酸Ij甲醇直接合成寓15酸。甲酯(DMF)的新I‘藝;H時(shí)進(jìn)行,富馬酸.甲酯的應(yīng)F日丌發(fā)實(shí)驗(yàn)。f舊對(duì)現(xiàn)行r。藝使用無(wú)機(jī)酸為催化劑所存在的污染環(huán)境,腐蝕沒(méi)薪及產(chǎn)lu『純度l低等實(shí)際問(wèn)題,提出J’利用固體超強(qiáng)酸為催化劑,dI富馬酸與甲醇A接合成富t‘酸_甲酯的療法。為提高該酯化反應(yīng)平新轉(zhuǎn)化率,需解決反應(yīng)牛成的水的及時(shí)j:除問(wèn)題。本研究中采用了精餾_F段來(lái)分離水和未反應(yīng)的甲醇,分離
2、后的呵]醇義干1。為原料及時(shí)回流至反應(yīng)體系。水也同時(shí)得到了去除。利用固體超強(qiáng)酸镩化與精餾技術(shù)相結(jié)合,探討了用Zr021SOa2。、Ti02/S042-等固體超強(qiáng)酸及固體酸H催化合成寓弓酸二甲酯的適宜工藝條件;同時(shí)探討了孵化剖的制各條件、催化劑的活化:以及原料配比,反應(yīng)時(shí)間,催化劑用量等L藝參數(shù)對(duì)DMF收率的影響。^:適宜的I一藝條件下DMF收率達(dá)到90%,催化劑的重復(fù)使用實(shí)驗(yàn)表明Zr02/SO。。、Ti02/\sO。2。是DMF合成的較為適宜的催化劑。/{一/論文還研究了用紫外分光光度法測(cè)定富馬酸二甲酯(DMF)含量的療法,探討了測(cè)定過(guò)程中條件的變化對(duì)測(cè)定準(zhǔn)確度的影響
3、,獲得了測(cè)定的適宜條件。測(cè)定結(jié)果表明,分光光度法比色譜分析法具有更高的準(zhǔn)確性。此外,還進(jìn)行了富馬酸二甲酯的毒性評(píng)價(jià),并開(kāi)展了富馬酸二甲酯在糧食防霉、飼料防霉等領(lǐng)域的應(yīng)用實(shí)驗(yàn)。關(guān)鍵詞屜02/S042.、zr02/s@固體粵璺璧,、富馬酸二甲酯’,儲(chǔ)化合f茂、/第1頁(yè)天漳大學(xué)碩士掌位論文ABSTRACTThispaperintroducedanewprocessfortheproductionofDimethylFumarate(DMF)usingsolidacidcatalystsA[1ewmethodforthedeterminationoftheDMFcontent
4、byultraviolet(UV)spectrophotometryandtheapplicationofDMFinperservationfiledsw'erealsodeveloped.ToovercomethedisadvantagesandrestrictionsofthepresentsynthesismethodsofDMF,thispaperemployedanewapproach:usingsolidacidZrOffS04:Ti02/s04:andsolidacidHascatalysts,introducingdistillationtosolve
5、theseperationofmethanolunreactedandthewaterproduced,toavoidthecatalystpollution.Theinfluencingfactorsinvolvedincatalystreparation,suchascataystactivationandprocessingconditionsontheyieldofDIVlFwasinvestigated,Thecatatlystsshowedverygoodstability,AppropriateconditionsforthesynthesisofDMF
6、weresubsequentlyobtained.ThemaximalyieldofDIVlFhasreachedupto90%.KineticexperimentswereconductedonthereactionemployingsolidacidcatalystHandthefittedequationexhibitedone—orderreactionkinetics.ThispaperintroducedtheUltravioletspectrophotometrymethodforthedeterminationofthecontentofDMFThef
7、ollowingconditionsforthemeasurementwasobtained:wavelength208-212rim;temperature19-25*C;anhydrousethanolassolvent;pH=7.25-825.Thecalibrationequationisp=o,0933A+0.0416.ComparingwiththeresultsbyGC/MS.thismethodhasthehigheraccuracy.Furthermore,theapplicationofDlVIFinvariouspreserva