Production of aromatic carboxylic acids
US3968152A · kind A · utility
11Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1975 |
| Grant date | Jul 6, 1976 |
| Priority date | — |
| Expiry date | Jan 31, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Aromatic mono- and polycarboxylic acids are produced by hydrolyzing the corresponding mono- and polynitriles in aqueous slurry containing a catalyst, removing ammonia from the hydrolysis mixture by countercurrent stripping with steam, and cooling the hydrolysis product to separate the carboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.