齐齐哈尔大学化学工程与工艺专业毕业设计论文万吨丙二醇设计.docVIP

摘要

1,3-丙二醇又名尼龙酸，是己二酸生产过程产生的副产物，仅国内己二酸生产公司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，难以运用。国外一般将其送进污水解决装置作焚烧或填埋解决；国内有采用重结晶法回收，但回收率低于60％，废水量较大，不仅对环境导致污染，并且也导致资源的浪费。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，并运用减压精馏得到纯净的二甲酯。实验中考察了各种反映的影响因素，并运用制备的混合二甲酸二甲酯与异辛醇进行酯互换制备混合二元酸二异辛酯。

关键词：甲醇羰基化；1,3-丙二醇；酯互换；混合二元酸二甲酯

Abstract

Mixeddibasicacid(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摘要 I

Abstract II

第1章绪论 1

1.1课题的目的、意义 1

1.1.11,3-丙二醇的由来 1

1.1.21,3-丙二醇的运用