三丁基甲基乙酸铵分离乙酸乙酯-甲醇的研究

doi:10.3969/j.issn.2095-2198.2023.01.003

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摘要

以三丁基甲基乙酸铵（［N₄₄₄₁］［OAC］）为萃取剂，用Aspen Plus软件模拟乙酸乙酯-甲醇体系的萃取精馏过程.通过灵敏度分析，系统地研究溶剂比、萃取精馏塔和萃取剂回收塔的理论塔板数和进料位置以及回流比7个参数对两塔塔顶产品纯度及热负荷的影响.通过灵敏度分析对这7个参数进行了优化，结果表明：最佳溶剂比为0.13，精馏塔和回收塔的最佳理论塔板数分别为35和4，最佳进料位置分别为第8块板和第3块板，精馏塔和回收塔的最佳回流比分别为0.96和0.82.在此优化工艺参数下，萃取精馏塔塔顶乙酸乙酯和萃取剂回收塔塔顶甲醇的质量分数均达到99.9%以上.

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关键词: 离子液体')" href="#">

离子液体萃取精馏乙酸乙酯乙醇

Abstract:

Aspen Plus software was used to simulate the extractive distillation process of ethyl acetate-methanol azeotropic system with tributyl-methylammonium acetate(［N₄₄₄₁］［OAC］) as the entrainer.The influence of seven parameters,including the solvent ratio,the theoretical plate number and feed position of extractive distillation column and extractant recovery column,and the reflux ratio of extractive distillation column and extractant recovery column on the purity of the top product and the heat duty of the two columns were systematically studied through sensitivity analysis.These seven parameters were optimized by sensitivity analysis,and the optimization results are as follows:the optimal the solvent ratio is 0.13,the optimal number of theoretical plates of extractive distillation column and extractant recovery column are 35 and 4,respectively,the optimal feed positions are the 8th plate and the 3rd plate,respectively,and the optimal reflux ratio of extractive distillation column and extractant recovery column are 0.96 and 0.82,respectively.Under the optimized process parameters,the mass fractions of ethyl acetate at the top of the extractive distillation column and methanol at the top of the extractant recovery column can reach more than 99.9%.

Key words: ionic liquid')" href="#">

ionic liquid extractive distillation ethyl acetate methanol

出版日期: 2023-02-27 发布日期: 2024-06-06 整期出版日期: 2023-02-27

ZTFLH:

TQ 028.1

基金资助:

国家自然科学基金项目（21576166）

作者简介: 王丽达(1995—）,女,河北唐山人,硕士研究生在读,主要从事传质与分离的研究.

引用本文:

王丽达, 李文秀, 范雪莹, 何鑫, 张志刚, 张亲亲, 辛华, 张弢.

三丁基甲基乙酸铵分离乙酸乙酯-甲醇的研究 [J]. 沈阳化工大学学报, 2023, 37(1): 16-22.
WANG Lida, LI Wenxiu, FAN Xueying, HE Xin, ZHANG Zhigang, ZHANG Qinqin, XIN Hua, ZHANG Tao.

Study on the Separation of Ethyl Acetate-Methanol System with Tributyl-Methylammonium Acetate . Journal of Shenyang University of Chemical Technology, 2023, 37(1): 16-22.

链接本文:

https://xuebao.syuct.edu.cn/CN/10.3969/j.issn.2095-2198.2023.01.003 或 https://xuebao.syuct.edu.cn/CN/Y2023/V37/I1/16

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