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Energy-saving quaternary extractive distillation processes with single- or double-dividing-wall column for separation of acetone/methanol/butanone/tert-butyl alcohol
Chemical Engineering and Processing: Process Intensification ( IF 3.8 ) Pub Date : 2020-06-11 , DOI: 10.1016/j.cep.2020.107999
Xiaojing Shi , Xiaoxiao Zhao , Zhishan Zhang , Min Li , Jun Gao

This article proposes two energy-saving extractive distillation configurations with single- or double-dividing-wall column, based on a conventional four-column extractive distillation process —CFC-ED, to efficiently separate a quaternary compound of acetone/methanol/butanone/ tert-butyl alcohol with chlorobenzene as a solvent. One is composed of two single-dividing-wall extractive distillation columns—SDWCs-ED; the other consists of an extractive distillation column and double-dividing-wall extractive distillation column—DDWC-ED. The parametric optimization is carried out with the minimum total annual cost (TAC) as a goal and adopts a sequential iterative procedure. The comparison with the CFC-ED process shows that the SDWCs-ED process can reduce the TAC by 12.50 % and CO2 emission by 24.23 % while the DDWC-ED process can save the TAC by 11.97 % and CO2 emission by 14.43 %.



中文翻译:

单壁或双壁塔节能季铵萃取蒸馏工艺,用于分离丙酮/甲醇/丁酮/叔丁醇

本文基于常规的四柱萃取蒸馏工艺-CFC-ED,提出了两种具有单壁或双分隔壁塔的节能萃取蒸馏配置,以有效分离丙酮/甲醇/丁酮/叔胺的季化合物。丁醇,以氯苯为溶剂。一个由两个单分隔壁萃取蒸馏塔—SDWCs-ED组成;另一个由萃取蒸馏塔和双壁式萃取蒸馏塔DDWC-ED组成。参数优化以最低年度总成本(TAC)为目标进行,并采用顺序迭代过程。与CFC-ED工艺的比较表明,SDWCs-ED工艺可以将TAC降低12.50%,并减少CO 2DDWC-ED工艺可节省24.23%的碳排放,而DDWC-ED工艺可节省TAC的11.97%和CO 2排放的14.43%。

更新日期:2020-06-11
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