Invention Grant
- Patent Title: Preparation of alkali metal salts of L-ascorbic acid
- Patent Title (中): L-抗坏血酸的碱金属盐的制备
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Application No.: US09688882Application Date: 2000-10-17
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Publication No.: US06274744B1Publication Date: 2001-08-14
- Inventor: Wolfram Burst , Gerd Kaibel , Andreas Böttcher , Veronique Kessler , Thomas Kuntze
- Applicant: Wolfram Burst , Gerd Kaibel , Andreas Böttcher , Veronique Kessler , Thomas Kuntze
- Priority: DE19954511 19991112
- Main IPC: C07D30762
- IPC: C07D30762
Abstract:
A process for preparing alkali metal salts of L-ascorbic acid comprising the following steps: a) esterifying 2-keto-L-gulonic acid or diacetone-2-keto-L-gulonic acid with a C1-C10-alkohol in the presence of an acid catalyst, b) rearranging the resultant 2-keto-L-gulonic acid C1-C10-alkyl ester in the presence of an alkali metal C1-C10-alkoxide, comprises carrying out each of the process steps a) and b) continuously.
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