基于正交实验的乙酸乙酯-乙腈共沸物萃取精馏工艺优化  

Optimization of Ethyl acetate-acetonitrile Azeotrope with Extractive Distillation Process Based Onorthogonal Experiment

作　　者：孙旭林[1] 马永连 陈凤[1] 李静[1] 连明磊[1] 叶昆 

机构地区：[1]六盘水师范学院化学与化学工程系,贵州六盘水553004 [2]中国石油集团工程设计有限责任公司华北分公司,河北任丘062552

出　　处：《科技广场》2017年第2期123-125,共3页Science Mosaic

基　　金：贵州省科技厅联合基金项目(黔科合J字LKLS[2013]27号);贵州省教育厅教学内容与课程体系改革项目(编号:GZSJG10977201604);贵州省教育厅重点科研项目(黔教合KY字[2014]282);贵州省教育厅特色重点实验室项目([2011]278);贵州省普通高等学校煤系固体废弃物资源化技术创新团队(黔教合人才团队字[2014]46号);贵州省煤炭资源清洁高效利用科研实验平台(黔科平台[2011]4003号)

摘　　要：本文基于化工模拟软件Aspen Plus V7.3,选用1,3-丙二醇为萃取剂,对乙酸乙酯—乙腈共沸体系的连续萃取精馏过程进行模拟与条件优化;利用正交实验对工艺参数进行优化。结果表明,在全塔理论板数为43,原料和萃取剂分别在第20块和第4块理论板进料,回流比为1.5,溶剂比为2.4的条件下,可得到纯度分别为99.96%和99.79%的乙酸乙酯和乙腈,萃取剂1,3-丙二醇的循环补充量为0.12kg/h。模拟与优化结果为乙酸乙酯—乙腈共沸物连续萃取精馏分离过程的工业化设计和操作提供了理论依据和设计参考。Continuous extractive distillation process forethylacetate-acetonitrileazeotropic system wassimulated and optimized using Aspen Plus V7.3. 1,3-propandiol was selected as a suitable extractant. Through the orthogonal experimentation,thetechnologic parameter was optimized. Thesimulation result shows that the mass fraction of ethyl acetate and acetonitrilecanreached 99.95% and 99.79%,cyclic supplementation of1,3-propandiol is3.25kg/h while the number of theory stages is 45,the mixture feed stage is 19 th,the solvent feed stage is 7th,the reflux ratio is 1.5,and the solvent ratio is 1.9.The results are useful for the design and operation of continuous extractive distillation process for ethyl acetate-acetonitrileazeotropicsystem.

关 键 词：萃取精馏 乙酸乙酯 乙腈 1 3丙二醇 ASPEN Plus 

分 类 号：TQ028[化学工程]