Preparing EDC From Direct Chloration Of Dry Gas

Dichloroethane (EDC) is the basic material for preparing polrvinyl chloride (PVC). Direct chloration and oxychlorination are the traditional two methods to produce EDC from oil route. But pure ethylene is required in both of the methods. We can reduce dependence on ethylene using dry gas as substitute. At the same time, the prospection will be exciting because of the significant economic value.Develop a new process for preparing EDC from direct chloration of dry gas. The influences on this reaction by characteristics of mass transfer have been studied. Finally, optimal technology conditions are determined as follows:Reactor form is pipe reactor connecting bubble reactor in series, reaction temperature is 84℃, ratio of ethylene and chlorine is 1:1.2, catalyst consumption is 0.4% of the total EDC, residence time is 14 seconds. On this condition, selectivity of ethylene is 99.5%, conversion of ethylene is more than 98%, and the concentration of EDC can reach to 98.5%.