离子液体催化反应精馏合成乙酸乙酯工艺模拟

doi:10.16085/j.issn.1000-6613.2017-0719

化工进展 ›› 2018, Vol. 37 ›› Issue (02): 468-474.DOI: 10.16085/j.issn.1000-6613.2017-0719

离子液体催化反应精馏合成乙酸乙酯工艺模拟

董颜箔, 何瑞宁, 牟春霞, 邹昀, 童张法

广西石化资源加工及过程强化技术重点实验室, 广西大学化学化工学院, 广西南宁 530004

收稿日期:2017-04-21 修回日期:2017-05-26 出版日期:2018-02-05 发布日期:2018-02-05
通讯作者: 童张法,教授,主要从事化学工程基础和精细化工应用方面的研究。
作者简介:董颜箔(1989-),男,硕士研究生,研究方向为基本有机化工。
基金资助:
广西石化资源加工及过程强化技术重点实验室主任基金（2017Z001 ）、广西自然科学基金（2014GXNSFAA118061，2017GXNSFDA198047）及广西自然科学基金创新团队（2016GXNSFGA380003）项目。

Process simulation of synthesis of ethyl acetate by reactive distillation catalyzed by ionic liquid

DONG Yanbo, HE Ruining, MU Chunxia, ZOU Yun, TONG Zhangfa

Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China

Received:2017-04-21 Revised:2017-05-26 Online:2018-02-05 Published:2018-02-05

摘要/Abstract

摘要： 为研究离子液体在反应精馏中的作用，采用离子液体1-丁基-3-甲基咪唑硫酸氢盐（[BMIM]HSO₄）作为催化剂，对乙酸和乙醇合成乙酸乙酯的反应精馏流程进行了计算模拟。在确定了参数的酯化反应动力学的基础上，用Aspen Plus软件建立了反应精馏流程，研究了催化剂用量、精馏段理论板数、反应段理论板数、乙醇进料位置、进料摩尔比、持液量及回流比等参数对反应精馏过程的影响。研究结果表明，塔顶乙酸乙酯的质量分数随催化剂用量、精馏段理论板数、反应段理论板数和持液量增大而增大，工艺流程存在最佳回流比以及最佳进料酸醇摩尔比。得到的优化条件如下：离子液体与乙酸摩尔比为1：2.5，进料酸醇摩尔比为4：1，理论塔板数为21块，乙酸和催化剂在第7块理论塔板进料，乙醇在第19块理论塔板进料，塔板持液量0.1L，回流比为4，塔顶乙酸乙酯的质量分数可以达到98.73%。

关键词: 反应精馏, 离子液体, 酯化, 模拟

Abstract: In order to study the effect of ionic liquid in reactive distillation, the synthetic process of ethyl acetate by reactive distillation was simulated using ionic liquid 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIM]HSO₄) as catalyst. On the basis of the obtained parameters of esterification reaction kinetics, the reaction distillation process was established with Aspen Plus software. The effects of catalyst dosage, distillation plate number, reaction plate number, feed position, feed molar ratio, liquid holdup and reflux ratio on reactive distillation process were investigated. It was found that the mass fraction of ethyl acetate at the top of the column increased with the increase of catalyst dosage, distillation plate number, reaction plate number and trays liquid holdup. The process had the optimum reflux ratio and feed molar ratio. The optimized conditions were as follows:the molar ratio of ionic liquid to acetate acid of 1:2.5, the molar ratio for acetate acid to ethanol of 4:1, the theoretical plate number of 21, the 7th plate for feeding the acetic acid and catalyst, the 19th plate for feeding the ethanol, the trays liquid holdup of 0.1L and the reflux ratio of 4. Under the optimized conditions, the mass fraction of ethyl acetate at the top of the column was 98.73%。

Key words: reactive distillation, ionic liquids, esterification, simulation

中图分类号:

TQ216

董颜箔, 何瑞宁, 牟春霞, 邹昀, 童张法. 离子液体催化反应精馏合成乙酸乙酯工艺模拟[J]. 化工进展, 2018, 37(02): 468-474.

DONG Yanbo, HE Ruining, MU Chunxia, ZOU Yun, TONG Zhangfa. Process simulation of synthesis of ethyl acetate by reactive distillation catalyzed by ionic liquid[J]. Chemical Industry and Engineering Progress, 2018, 37(02): 468-474.

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离子液体催化反应精馏合成乙酸乙酯工艺模拟

Process simulation of synthesis of ethyl acetate by reactive distillation catalyzed by ionic liquid

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