Title:
DEACETYLATION OF N-ACETYLGLUCOSAMINE
Document Type and Number:
WIPO Patent Application WO2005056525
Kind Code:
A3
Abstract:
The invention provides methods of deacetylating N-acetylglucosamine by solid acid hydrolysis on a cation exchange resin. These methods advantageously reduce the amount of acid used and the need for acid recycle facilities. The isolated glucosamine salt produced is very clean, reducing or eliminating the need for further purification steps to decolorize or desalt the product. Using these methods, the number of crystallization steps required are minimized and the degradation of the N-acetylglucosamine in solution is significantly reduced leading to increased yield of high quality glucosamine.
Inventors:
GRUND ALAN D
JERRELL THOMAS A JR
JERRELL THOMAS A JR
Application Number:
PCT/US2004/041771
Publication Date:
October 13, 2005
Filing Date:
December 09, 2004
Export Citation:
Assignee:
BIO TECH RESOURCES (US)
International Classes:
A61K31/7008; C07H5/04; C07H5/06; C07D; (IPC1-7): C07H5/04; C07H5/06
Foreign References:
| JPH057496A | 1993-01-19 | |||
| US4804750A | 1989-02-14 | |||
| US20040091976A1 | 2004-05-13 |
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