Process for the production of dichlorohydrin

Details Process for the production of dichlorohydrin Process for the production of dichlorohydrin

C - Chemistry, Metallurgy

07

C

204/98.03, 260/6

C07C 31/34 (2006.01) C07C 31/36 (2006.01)

Patent

CA 1258472

A B S T R A C T PROCESS FOR THE PRODUCTION OF DICHLOROHYDRIN The invention relates to a continuous process for the produc- tion of an organic solvent solution of dichlorohydrin, which comprises: a) reacting allyl chloride, water and chlorine in a reaction zone to form an aqueous solution of dichlorohydrin, b) contacting in an extraction zone the reaction zone effluent with a water-immiscible inert organic solvent for the dichloro- hydrin to obtain a dichlorohydrin-enriched solvent and an aqueous phase, c) passing said dichlorohydrin-enriched solvent from said extrac- tion zone, d) passing said aqueous phase from the extraction zone to an electrodialysis zone, e) electrodialyzing said aqueous phase in said electrodialysis zone to obtain: (1) a concentrate stream having chloride content higher than said aqueous phase, and (2) a diluate stream having chloride content lower than said aqueous phase, f) withdrawing said concentrate stream, and g) recycling at least part of said diluate stream from step (e) to the reaction zone of step (a).

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