Abstract: The present invention relates to a novel process for producing N-acetyl-D-Glucosamine from Glucosamine hydrochloride. More particularly this invention pertains to a novel and simple environmentally acceptable process for producing glucosamine base solution in water, with very low halide content. Glucosamine base in solution with >95% chloride ion removal is further reacted with acylating agent to produce N-acetyl-D-Glucosamine with >99% purity and chloride content of <0.1%.

Abstract: The present invention relates to a process for preparing a mixed salt of glucosamine sulfate and an alkali metal chloride. The process comprises the consecutive steps of: a) suspending glucosamine hydrochloride in a non-aqueous solvent, b) adding thereto a solution of a basic alkali metal salt in water, and c) adding thereto a solution of an alkali metal hydrogen sulfate in water whereby the mixed salt is obtained.