Method for purifying crude aromatic carboxylic acids
US5354898A · kind A · utility
25Cited by
8References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1993 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Jun 17, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/487
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method is disclosed for the purification of crude aromatic carboxylic acid by passing a solution of crude aromatic carboxylic acid in the presence of hydrogen through a first zone containing a hydrogenation catalyst based on a carbon carrier material then passing the solution through an abrasion resistant material thereby reducing the amount of carbon particles contained in the purified aromatic carboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.