Process for recovering high-purity organic acid
US5349084A · kind A · utility
19Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1991 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Sep 25, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/42
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for inexpensively and effectively recovering a high-purity organic acid, according to which a crude organic acid is subjected to extraction treatment with an organic solvent to obtain an organic solvent extract containing an organic acid; the organic solvent extract is mixed with a high-pressure gas to precipitate and separate impurities thereby obtaining a solution containing a high-purity organic acid; and the organic acid is separated from the solution to obtain a high-purity organic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.