Microbial process for producing L-ascorbic acid, D-erythorbic acid, and salts thereof
US6777212B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2001 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Apr 26, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12P17/04
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
A process for producing L-ascorbic acid or D-erythorbic acid, or in each case its sodium, potassium or calcium salt, from 2-keto-L-gulonic acid or 2-keto-D-gluconic acid, or in each case its sodium, potassium or calcium salt, that involves incubating 2-keto-L-gulonic acid or 2-keto-D-gluconic acid, each as the free acid or as its sodium, potassium or calcium salt, and the cells of a thermoacidophilic microorganism at temperatures from about 30° C. to about 100° C., and at a pH from about 1 to about 6, in a solution, to form L-ascorbic acid or D-erythorbic acid or an appropriate salt thereof, and isolating said product from the solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.