Patent ID: 6486307
Filing Date: 2002-11-26
Classification: C08B

Abstract:
A method of producing glucosamine hydrochloride from chitin or chitinaceous material, said method comprising the steps of:(a) grinding the chitin or chitinaceous material to less than about âˆ’20 mesh; (b) digesting the chitin with prewarmed, concentrated HCl, by mixing the chitin with the HCl, and heating to about 95Â° C. to produce a slurry; (c) cooling the slurry to room temperature and filtering the precipitate; (d) dissolving the precipitate in water and with activated charcoal at room temperature; (e) filtering the solution and discarding the solids; (f) evaporating the solution to recover GHCl solids; (g) washing the solids with ethanol and filtering the solids/ethanol mixture to separately recover both the solids and the ethanol; and (h) drying the solids.