Halide-free glucosamine base and method of preparation

Details Halide-free glucosamine base and method of preparation Halide-free glucosamine base and method of preparation

2005-09-09

2009-11-24

McIntosh, III, Traviss C (Department: 1623)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

C536S055300, C536S124000, C514S062000

Reexamination Certificate

active

07622576

ABSTRACT:
A glucosamine base having a pure level of at least about 99.0 wt. % and a maximum halide content of 0.01 wt. %. The pure glucosamine base is prepared by reacting a glucosamine halide, e.g., glucosamine hydrochloride, with a lithium base in the presence of a C1-C4alcohol to thereby generate a C1-C4alcohol solution of a lithium halide and an insoluble halide-free glucosamine base and thereafter separating the insoluble halide-free glucosamine base from the C1-C4alcohol solution of the lithium halide. Preferably, the lithium base comprises anhydrous lithium hydroxide and the preferable alcohol comprises methanol.

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