乙酸乙酯-乙腈萃取精馏的模拟优化  

The simulation of ethyl-acetate-acetonitrile azeotrope with continuous extractive distillation

作　　者：高孜孜 袁慎峰[1] 陈志荣[1] 尹红[1] 

机构地区：[1]浙江大学化学工程与生物工程学院,浙江杭州310027

出　　处：《计算机与应用化学》2015年第3期281-284,共4页Computers and Applied Chemistry

基　　金：浙江省重点科技创新团队计划资助项目(2011R50007)

摘　　要：应用化工模拟软件Aspen Plus对乙酸乙酪-乙腈最低共沸物系的连续萃取精馏过程进行了模拟与优化。通过绘制拟二元汽液平衡相图,筛选出合适的萃取剂为二甲基亚砜(DMsO)。确定了双塔连续萃取精馏的工艺流程,并利用灵敏度分析考察了萃取精馏塔的全塔理论板数、原料进料位置、萃取剂进料位置、回流比、溶剂比(萃取剂对原料的体积比)等因素对分离效果的影响。确定的最佳工艺方案为:全塔理论板数为33,原料和萃取剂分别在第26块和第5块理论板进料,回流比为1.5,溶剂比为3。模拟与优化结果为乙酸乙酯.乙腈萃取精馏分离过程的设计和操作提供了依据。Continuous extractive distillation process for ethyl acetate-acetonitrile azeotropic system was simulated and optimized using Aspen Plus. By Flash 2 module and the pseudo-binary phase diagram, DMSO was selected as a suitable solvent. The process of continuous extractive distillation with two towers was confirmed. Effects of the number of theory stages, the mixture feed stage, the solvent feed stage, the reflux ratio and the volume ratio of solvent to mixture （solvent ratio） were investigated using sensitivity analysis module. The optimal condition for the extractive distillation is as follows： the number of theory stages is 33, the mixture feed stage is 26, the solvent feed stage is 5, the reflux ratio is 1.5, and the solvent ratio is 3.The results are useful for the design of the separation of ethyl acetate-acetonitrile.

关 键 词：ASPEN PLUS 乙酸乙酯 乙腈 DMSO 萃取精馏 

分 类 号：TQ015.9[化学工程] TP391.9[自动化与计算机技术—计算机应用技术]