Study on separation of tetrahydrofuran-ethanol-water ternary azeotrope system by ionic liquid

被引：0
|
作者：
Li W. [1 ]
Zhang Y. [1 ]
Cao Y. [1 ]
Ding Z. [1 ]
Zhao S. [1 ]
Zhang T. [1 ]
机构：
[1] School of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, Liaoning
来源：
Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 04期
关键词：
Azeotrope; Extractive distillation; Ionic liquid; Mechanism; Simulation;
D O I：
10.11949/0438-1157.20190844
中图分类号：
学科分类号：
摘要：
Using ionic liquid 1-butyl-3-methylimidazolium dicyandiamide ([BMIM][DCA]) as extractant, the separation of tetrahydrofuran (THF)-ethanol-water ternary azeotrope was studied by process simulation and mechanism analysis. Based on COSMO-RS theory, suitable ionic liquid [BMIM] [DCA] was selected with selectivity as performance index, and the extractive distillation process was established with [BMIM] [DCA] as extractant and suitable operating conditions. The simulation results showed that the mass fraction of THF, ethanol and water was close to 1. Through the analysis of σ-profiles of [BMIM] [DCA] and three solutes, it is found that [BMIM] [DCA] can form stronger hydrogen bonds with three solutes respectively, thus breaking the inherent hydrogen bonds between the three solutes and eliminating their azeotropy. © All Right Reserved.
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页码：1676 / 1682
页数：6
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