乙酸乙酯反应精馏ASPEN模拟
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摘要
乙酸乙酯是应用广泛的工业溶剂,可以用作清洗剂、萃取剂等。目前国内主要采用直接酯化法,该工艺因设备腐蚀严重、副反应多、反应废液难处理等缺陷而逐渐被淘汰。因此采用新的乙酸乙酯合成工艺改进具有紧迫的现实意义,反应精馏技术将是合成乙酸乙酯的发展方向。采用Aspen Plus软件对直接酯化工艺和反应精馏工艺进行模拟,通过优化得到两种工艺的耗能情况。结果表明:反应精馏法比直接酯化法节能,节约能耗2456.2 kW,占传统酯化工艺总能耗的20.35%。
Ethyl acetate is widely used industrial solvents, such as cleaning agents, extractants and so on. At present, the traditional process of direct esterification method was commonly used. However, it would be replaced gradually due to serious corrosion of equipment, more side reactions leading to deal with the waste with difficulty. Therefore, the improvement of ethyl acetate synthesis process has urgent practical significance. Reactive distillation technology will be the development direction of synthetic ethyl acetate. The process of ethyl acetate by reactive distillation and direct estifieration with simulated by Aspen Plus and compared by the optimization of energy efficiency. The results indicated that the reactive distillation method saves more energy than the traditional method, It saves 2456.2 kW, accounting for 20.35 % of the total energy consumption of the traditional process.
Ethyl acetate is widely used industrial solvents, such as cleaning agents, extractants and so on. At present, the traditional process of direct esterification method was commonly used. However, it would be replaced gradually due to serious corrosion of equipment, more side reactions leading to deal with the waste with difficulty. Therefore, the improvement of ethyl acetate synthesis process has urgent practical significance. Reactive distillation technology will be the development direction of synthetic ethyl acetate. The process of ethyl acetate by reactive distillation and direct estifieration with simulated by Aspen Plus and compared by the optimization of energy efficiency. The results indicated that the reactive distillation method saves more energy than the traditional method, It saves 2456.2 kW, accounting for 20.35 % of the total energy consumption of the traditional process.
引文
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[5]田敉,王孝科.采用质子酸离子液体反应萃取精馏制备醋酸甲酯[J].石油化工,2009,38(6):603-607
[6]史琴,张鹏远,初广文.超重力催化反应精馏技术合成乙酸正丁酯的研究[J].北京化工大学学报(自然科学版),2011,38(1):5-9.
[7]高彩虹,郭延红,尉芳宁.反应精馏法合成乙酸乙酯工艺条件的选择[J].化学与黏合,2009,31(3):23-25.
[2]Kurabayashi K Inuit,Sato S.Direct synthesis of ethyl acetate from ethanol carried out under pressure[J].Journal of Catalysis,2002,212:207-215.
[3]Taylor R,Krishna R.Modelling reactive distillation[J].Chemical Engineering Science,2000,55(22):5183-5229.
[4]Sehmitt M.Preparate Butyl acrylate acid[J].Chemical Engineering and Processing,1992,43(3):1036-1040.
[5]田敉,王孝科.采用质子酸离子液体反应萃取精馏制备醋酸甲酯[J].石油化工,2009,38(6):603-607
[6]史琴,张鹏远,初广文.超重力催化反应精馏技术合成乙酸正丁酯的研究[J].北京化工大学学报(自然科学版),2011,38(1):5-9.
[7]高彩虹,郭延红,尉芳宁.反应精馏法合成乙酸乙酯工艺条件的选择[J].化学与黏合,2009,31(3):23-25.