变压精馏分离异丁醇-乙酸异丁酯工艺模拟  

Optimization of separation process for isobutanol and isobutyl acetate by pressure swing distillation

作　　者：刘艳杰 王桂英 潘高峰 戴传波 LIU Yan-jie;WANG Gui-ying;PAN Gao-feng;DAI Chuan-bo(Institute of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin 132022, China)

机构地区：[1]吉林化工学院石油化工学院,吉林吉林132022

出　　处：《现代化工》2017年第12期182-185,共4页Modern Chemical Industry

基　　金：吉林省重点科技攻关资助项目(20170204009GX)

摘　　要：基于异丁醇-乙酸异丁酯共沸体系的特性分析,提出了建立变压精馏过程分离异丁醇-乙酸异丁酯的工艺方法。利用Aspen Plus模拟软件,以产品异丁醇和乙酸异丁酯质量分数为约束变量,过程能耗最低为目标函数,对该体系进行了工艺模拟与优化,考察了理论板数、进料位置、回流进料比等参数对分离效果的影响。结果表明最优条件为:减压塔操作压力20 k Pa,理论塔板数60,进料位置30,回流比8.5;常压塔操作压力100 k Pa,理论塔板数30,进料位置22,回流比5。在此条件下,得到质量分数不低于0.998的异丁醇和乙酸异丁酯产品,回收率均达到99.9%以上。The pressure swing distillation process for separation of isobutanol and isobutyl acetate is proposed on the basis of carrying out characteristics analysis on the isobutanol-isobutyl acetate azeotropic system. The optimization and simulation on this system are performed by using Aspen Plus simulation software,aiming at minimizing the energy consumption with the concentrations of isobutanol and isobutyl acetate products as constraint variables.The influences of total number of theoretical plate,reflux ratio,feeding position and other parameters on the separation efficiency are specified.The optimal operation parameters for the vacuum distillation tower are as follows： the operating pressure is 20 kPa,the number of theoretical plate is 60,the feeding position is at the 30 th plate,and the reflux ratio is 8. 5.The optimal operation parameters for the atmospheric distillation tower are as follows： the operating pressure is 100 kPa,the number of theoretical plate is 30,the feeding position is at the 22 nd plate,the reflux ratio is 5. Under the optimal parameters,the mass fractions of both isobutanol and isobutyl acetate products exceed 0. 998,and the yields are both more than 99. 9%.

关 键 词：异丁醇 乙酸异丁酯 共沸体系 变压精馏 模拟 

分 类 号：TQ028.13[化学工程]