PAGEII摘要环己酮又名尼龙酸，是己二酸生产过程产生的副产物，仅国内己二酸生产企业每年就副产混合二元酸40-60万吨。由于其含杂质、水分多，颜色呈绿色或黄褐色，难以利用。国外一般将其送进污水处理装置作焚烧或填埋处理；国内有采用重结晶法回收，但回收率低于60％，废水量较大，不仅对环境造成污染，而且也造成资源的浪费。为了物尽其用，本文开展了应用基础研究以C4-C6混合二元酸为原料、对甲苯磺酸为催化剂，制备混合二元酸二甲酯，并利用减压精馏得到纯净的二甲酯。实验中考查了各种反应的影响因素，并利用制备的混合二甲酸二甲酯与异辛醇进行酯交换制备混合二元酸二异辛酯。关键词：环己酮；环己烯；酯交换；混合二元酸二甲酯AbstractMixeddibasicacid(DBA),alsoknownasnylonacid,adipicacidproductionprocessby-products,onlydomesticproducersofadipicacidby-productmixtureineachofdicarboxylicacid40-60milliontons.Becauseofitsimpurities,watercontent,thecolorgreenorbrown,itisdifficulttouse.Foreigngeneraltobesenttosewagetreatmentplantforincinerationorlandfilling;domesticuserecrystallizationrecovery,butrecoverywaslessthan60%,largeamountofwastewater,notonlypollutetheenvironment,butalsoawasteofresources.Inordertomakethebestuse,thisapplicationofbasicresearchcarriedouttoC4-C6dicarboxylicacidasrawmaterialmixture,p-toluenesulfonicacidascatalyst,preparedbymixingtwoyuanacidester,andtheuseofvacuumdistillationtogetpuredimethylester.Experimentexaminedtheresponseofvariousfactors,anduseamixtureofdimethylesterpreparedwithdifferentoctanolpreparedbymixingtwoyuanfortransesterificationethylhexylsebacate.Accordingtotheexperimentaldatashowthat,byesterificationofdicarboxylicacidmixtureseparationprocessrouteisfeasible.Esterificationoftheappropriatereactionconditions:reactiontime5.0h,alkydmolarratioof6:1,1.0%mixedacidcatalyst,inthiscondition,binaryacidesteryieldof89%.Estersderivedfromcrudeesterificationcanbecarriedoutunderthepressureof40mmHgvacuesterificationcanbeeffectivelyseparatedmixeddicarboxylicacid.Keywords:mixeddibasicacid;toluenesulfonate;transesterification;mixedtwoyuanDimethyl目录TOC\*MERGEFORMAT摘要PAGEREF_Toc296764631\hIAbstractPAGEREF_Toc296764632\hII第1章绪论PAGEREF_Toc296764633\h11.1课题的目的、意义PAGEREF_Toc296764634\h11.1.1环己酮的由来PAGEREF_Toc296764635\h11.1.2环己酮的利用PAGEREF_Toc296764636\h21.1.3环己酮的分离PAGEREF_Toc296764637\h31.1.4环己酮的用途PAGEREF_Toc296764638\h6