Halide-free glucosamine base and method of preparation
US7622576B1 · kind B1 · utility
1Cited by
9References
15Claims
0Family size
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Key dates
| Filing date | Sep 9, 2005 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | Aug 1, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2605/18
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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-C4 alcohol to thereby generate a C1-C4 alcohol solution of a lithium halide and an insoluble halide-free glucosamine base and thereafter separating the insoluble halide-free glucosamine base from the C1-C4 alcohol solution of the lithium halide. Preferably, the lithium base comprises anhydrous lithium hydroxide and the preferable alcohol comprises methanol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.