Pentenoic acid hydroxycarbonylation method
US6372942B1 · kind B1 · utility
2Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1999 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Mar 17, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention discloses pentenoic acid hydroxycarbonylation into adipic acid. More particularly, it concerns one pentenoic acid hydroxycarbonylation method involving reaction water and carbon monoxide, in the presence of a catalyst comprising at least rhodium and/or iridium and an iodinated or brominated catalytic promoter. In the method, the catalyst is derived at least in part from a previous pentenoic acid hydroxycarbonylation operation. The reaction is effected in the presence of an amount of branched carboxylic diacids having 6 carbon atoms not exceeding 200 grams per kilogram reaction mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.