Technical Basis And Engineering Analysis Of The Reaction Process Of The Oxychlorination Of Ethylene

Based on the analysis of present status of reaction technology of the oxychlorination of ethylene. a systematic investigating on the technical basis of the reaction process was carried out and the per formance of the commercial baffled fuidized bed (BFB) reactor, which was imported from Japan, was extensively and thoroughly analyzed from the engineering point of view.The intrinsic kinetics of the heterogeneous gas—phase oxyehlorination of ethlyene to 1,2-dichloroethane (EDC) was investigated in a differential fixed-bed tubular reactor, using CuCl₂/ A1₂O₃ as the catalyst and the reaction atmosphere was created to simulate that in the commercial reactor. The temperature range was 211²51℃. It was found that the reaction rate increases with the increase of partial pressures of ethylene and oxygen, but it is independent of the partial pressure of hydrogen chloride. Power-law rate equations were obtained by using nonlinear regression to cover the entire experimental range. The equations areThe models fit the experimental data with an average deviation of53% .The differences in surface structure and composition between the fresh catalyst and used catalyst were extensively determined to obtain important informations. An adsorption-redox mechanism was proposed on the basis of our experimental results. The experimental phenomena were reasonably explained and a mechanismic kinetic equation obtained was in the form of...