Catalyzed chlorination of acetic acid to continuous synthesize monochloroacetic acid

High purity monochloroacetic acid was prepared by catalylic chlorination of acetic acid with chorine by using acetic anhydride as the catalyst,and concentrated H2SO4 as the co-catalyst.The optimal conditions of synthesis were as follows:acetic acid /Cl2/acetic anhydride /H2SO4 is 1︰1.26︰ 0.08︰0.008,reaction temperature from 100 to 105℃.The purity of monochloroacetic acid can be up to 99%.This method has the advantages of abundant supply of raw materials,simple process,and easy operation.