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Multi‐Step Consecutive Photo‐Chlorination of 1,2‐Dichloroethane: Kinetics and Reactive Distillation Experiment
Author(s) -
Chen Xian,
Xu Ge,
Li Yunpeng,
Chen Wei,
Tang Jihai,
Fei Zhaoyang,
Cui Mifen,
Guo Haiwei,
Qiao Xu
Publication year - 2017
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201600545
Subject(s) - reactive distillation , kinetics , chemistry , dichloroethane , distillation , 1,2 dichloroethane , selectivity , batch reactor , molar ratio , catalysis , chemical engineering , chromatography , organic chemistry , engineering , physics , quantum mechanics
The development and validation of a novel kinetic model for the chlorination of 1,2‐dichloroethane to ultimately hexachloroethane catalyzed by blue light are presented. A factor ( X m ) related to the chlorination depth was introduced into the kinetics model, and the results showed that the dynamic features of the photo‐chlorination are better predicted by the modified model than by the conventional one. Furthermore, to enhance the selectivity towards tetrachloroethane and pentachloroethane, a novel reactive distillation with side‐reactor configuration (SRC) for the photo‐chlorination process was proposed. In order to demonstrate the technical feasibility of the process, semi‐batch SRC experiments on the laboratory scale were carried out. Up to 96.5 wt % of tetrachloroethane and pentachloroethane with molar ratios varying from 7 to 0.7 over time were obtained in the bottom product.