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In the oxychlorination of C2H4, copper chloride on the active carbon has a higher activity than catalysts on other sorts of carrier. Examinations were made as to what relations exist between the selectivity of 1, 2-dichloroethane and composition of supplied gas and the reaction temperature. Two ranges in which the selectivity of 1, 2-dichloroethane does not vary and CO2 produced in large quantity were observed. The breaking point of both range depends on the mole ratio of HCl/C2H4 in the supplied gas and the reaction temperature. When the reaction is performed with the supplied gas having higher than 2 mole ratio of HCl/C2H4 the oxide-forming range does not appear. The forming rate of 1, 2-dichloroethane is shown by the following equation at chloride-forming range,

Oxychlorination of Ethylene with Copper Chloride Catalyst