Eco-efficient Separation of Mono- and Dichloroacetic Acid by Thermally Coupled Extractive Distillation

被引：5

作者：

Chandra, Amit K. ^{[1
]}

Patrascu, Iulian ^{[2
]}

Bildea, Costin Sorin ^{[2
]}

Kiss, Anton A. ^{[1
]}

机构：

[1] Univ Manchester, Dept Chem Engn & Analyt Sci, Manchester M13 9PL, Lancs, England

[2] Univ Politehn Bucuresti, Polizu 1-7, Bucharest 011061, Romania

来源：

CHEMICAL ENGINEERING & TECHNOLOGY | 2020年 / 43卷 / 12期

关键词：

Chloroacetic acids; Extractive dividing-wall columns; Industrial separation; Process control; Process design; DIVIDING-WALL COLUMN; SYSTEM MONOCHLOROACETIC ACID; LIQUID-EQUILIBRIUM DATA; BIOETHANOL DEHYDRATION; ACETIC-ACID; DESIGN; CHLORINATION;

D O I：

10.1002/ceat.202000232

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Due to its high reactivity, monochloroacetic acid (MCA) is an essential intermediate used in the manufacturing of a wide variety of chemicals. Its industrial production process is highly energy- and capital-intensive, requiring costly purification steps to remove dichloroacetic acid (DCA) impurities. Here, an innovative eco-efficient process for MCA-DCA separation is proposed based on extractive distillation in a fully thermally coupled system (a dividing-wall column (DWC) or an equivalent side-rectifier configuration) using a new effective solvent: diethylene glycol dipentylether. The design was optimized by performing sensitivity analyses and varying key operating and design parameters. The study proves that separating MCA-DCA by an extractive DWC (or thermally coupled) is feasible, efficient, controllable, economic, and sustainable.

引用

页码：2403 / 2417

页数：15

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