New energy-saving process for ethyl methyl carbonate preparation by reactive distillation in the dividing-wall column

被引：0
|
作者：
Wang H. [1 ,2 ]
Li H. [1 ,2 ]
Zhou Q. [2 ]
Zhang L. [1 ]
机构：
[1] College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, Tianjin
[2] College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2020年 / 39卷 / S2期
关键词：
anti disproportionation; ethyl methyl carbonate; process simulation; reactive divided wall column;
D O I：
10.16085/j.issn.1000-6613.2020-0399
中图分类号：
学科分类号：
摘要：
A new process of reactive distillation in the dividing-wall column is proposed for the preparation of ethyl methyl carbonate (EMC). In addition to the interesterification between dimethyl carbonate (DMC) and ethanol, the effect of the anti-disproportionation reaction between dimethyl carbonate and diethyl carbonate (DEC) was also considered. The above reactions were integrated into an reactive distillation dividing-wall column to optimize the production process of methyl ethyl carbonate. Firstly, anti-disproportionation reaction between dimethyl carbonate and diethyl carbonate was conducted in laboratory, and the reaction kinetic model is established, experiments verified the reliability of the established process calculation results. Subsequently, the new process was simulated and optimized in Aspen plus, stage number of esterification reaction section, anti disproportionation reaction section, common stripping section, and product rectification section, the optimum feeding position, the optimum technical parameters such as reflux ratio was determined. Compared with traditional reaction distillation three column process, bottom product diethyl carbonate was returned to column in new process, an anti disproportionation reaction zone was added. Which improved product quality and yield obviously, avoided the output of low value by-products, also reduced equipment investment and energy consumption effectively. © 2020, Chemical Industry Press Co., Ltd.. All rights reserved.
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页码：66 / 72
页数：6
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