Process for the production of erythorbic acid
US5859262A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Nov 26, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/803
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
The invention provides a process for the recovery of erythorbic acid from an aqueous feed solution containing values of erythorbic acid at a concentration of less than 0.7 mol/kg, comprising adsorbing a major portion of said erythorbic acid with a solid phase adsorbent resin selected from resins carrying a pyridine function and resins of similar or weaker basicity; separating said erythorbic acid-containing resin from residual aqueous solution, and subjecting said erythorbic acid-containing resin to a desorbing operation with a neutral solvent at a temperature of at least 20.degree. C. higher than the temperature at which said adsorption is carried out, whereby there is obtained a solution of erythorbic acid in solvent in which the concentration of erythorbic acid is at least equal to its concentration in said aqueous feed solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.