Preparation of malic acid
US5210295A · kind A · utility
2Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 1991 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | May 24, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/367
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a process for the hydration of an acid selected from the group consisting of maleic acid, fumaric acid, sodium hydrogen maleate and mixtures thereof to malic acid in an aqueous reaction mixture in excellent yields and with particularly high purity by performing the synthesis in the presence of sodium ions in the molar ratio of sodium ions to acid or salt thereof in the range of from 0.2 to about 0.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.