Process for the synthesis of chloroacetic acid in which the hydrochloric acid produced is purified.

摘要

The invention relates in a process for the synthesis of chloroacetic acids by chlorination of acetic acid in the presence of acetic anhydride or acetyl chloride and which produces a gaseous stream of crude hydrochloric acid, the improvement comprising BR/ a / bringing this gaseous stream into contact with active carbon until the chlorine contained therein has disappeared, BR/ b / the separation, in the stream obtained in a, using at least one compression and cooling (i) of pure hydrochloric acid and (ii) other products, BR/ c / recycling of the other products (ii) in the chloroacetic acid synthesis reactor. / P