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 %.

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％。