Patent ID: 6875890

Claim:
A process for preparing N,N-dimethyl Glycine Hydrochloride, comprising the steps of: (a) adding water to chloroacetic acid to form a solution A; (b) stirringly dropping a liquid dimethylamine to said solution A to form a solution B; (c) decompressing and heating said solution B to form a decompressed solution B for eliminating ammonia and water; (d) adding hydrochloric acid to said decompressed solution B to form a solution C; (e) centrifuging said solution C to obtain a semifinished product; (f) adding deionized water to said semifinished product and then heating said semifinished product to form a deionized product; (g) adding a predetermined amount active carbon to said deionized product, and then filtering said deionized product to obtain a filtered solution D; and (h) cooling and centrifuging said filtered solution D to obtain said N,N-dimethyl Glycine Hydrochloride.