现代化工

现代化工 ›› 2020, Vol. 40 ›› Issue (7) : 221-225. DOI: 10.16606/j.cnki.issn0253-4320.2020.07.047

工业技术

双效萃取精馏工艺制备无水乙醇的模拟与优化

周俊伟, 张雷, 郭林樵

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Simulation and optimization of double-effect extractive distillation process for preparation of absolute ethanol

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Received		Published
2019-12-16		2020-07-20
Issue Date	Revised Date
2020-07-14	2019-12-16

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摘要

以甘油为萃取剂，通过普通萃取精馏和双效萃取精馏2种工艺萃取水与乙醇溶液制备无水乙醇，2种工艺都可以得到质量分数为99.99%的乙醇溶液，且萃取剂的回收率都较高。通过对2种工艺的工艺参数比较发现，双效萃取精馏工艺较普通萃取精馏更节能，节能率为14.91%。

Abstract

Using glycerol as extractant,absolute ethanol is prepared by extracting water and ethanol solution through common extractive rectification process and double-effect extractive rectification process,respectively.Both processes can give an ethanol solution with a mass fraction of 99.99%,and the recovery rates of the extractant are high.By comparing the parameters of these two processes,it is found that the double-effect extractive rectification process exhibits more energy-efficient than the common extractive distillation process,which can save 14.91% of energy consumption.