Carboxylic acid purification and crystallization process
US5034105A · kind A · utility
47Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1989 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | Jul 27, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/43
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing a carboxylic acid of high purity comprises preparing an undersaturated solution of a salt of the carboxylic acid; subjecting the undersaturated salt solution to water-splitting electrodialysis to form base and a supersaturated solution of the carboxylic acid; and, then crystallizing the carboxylic acid from the supersaturated solution. In the preferred embodiment, the undersaturated solution is a fermentation broth containing sodium succinate and the carboxylic acid obtained is succinic acid.
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