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Chlorination reactions relevant to the manufacture of trichloroethene and tetrachloroethene; Part 2: Effects of chlorine supply

Paper ID Volume ID Publish Year Pages File Format Full-Text
39912 45839 2014 8 PDF Available
Title
Chlorination reactions relevant to the manufacture of trichloroethene and tetrachloroethene; Part 2: Effects of chlorine supply
Abstract

•Application of oxychlorination for the synthesis of chloroalkenes is investigated.•A reaction scheme is proposed to describe accessible chemical pathways.•The effect of relative chlorine supply within the reaction zone is considered.

The behaviour of 1,1,2,2-tetrachloroethane and trichloroethene in chlorination reactions where the supply of chlorine is varied, either by change in chlorocarbon: Cl2 feed ratio or the quantity of supported copper(II) chloride catalyst or by the use of an anhydrous hydrogen chloride/dioxygen feed as the source of chlorine, i.e. oxychlorination conditions, is described. Depending on the exact conditions used, the products are trichloroethene, pentachloroethane or tetrachloroethene. The products and the conditions under which they are observed are both in harmony with a previously proposed reaction scheme in which there is interplay between heterogeneous and homogeneous reactions. It is possible to define sets of reaction conditions which lead to improvements in selectivity towards the formation of either CHCl=CCl2 or CCl2=CCl2 without significant formation of oligomeric species.

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Keywords
Chlorination; Oxychlorination; Dehydrochlorination; Heterogeneous catalysis; Copper(II) on attapulgite
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Chlorination reactions relevant to the manufacture of trichloroethene and tetrachloroethene; Part 2: Effects of chlorine supply
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 471, 10 February 2014, Pages 149–156
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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