Method of purifying aromatic dicarboxylic acids
US5565609A · kind A · utility
7Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1994 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | Nov 22, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/487
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is provided a method of purifying a crude aromatic dicarboxylic acid which comprises purifying an aqueous solution of an organic amine salt of the crude aromatic dicarboxylic acid, and then thermally decomposing the organic amine salt whereby to recover the thus highly purified aromatic dicarboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.