Purification of crude isophthalic acid
US4933492A · kind A · utility
12Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1989 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Oct 11, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/487
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Solutions of crude isophthalic acid are purified by hydrogenation in the presence of a catalyst comprising two Group VIII noble metal-containing components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.