Preparation of adipic acid by hydrocarboxylation of pentenoic acids
US5312979A · kind A · utility
4Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1993 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Jul 9, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Adipic acid is selectively prepared via hydrocarboxylation of pentenoic acids, by reacting water and carbon monoxide with at least one pentenoic acid, in the presence of a catalytically effective amount of a rhodium-based catalyst and at least one iodinated promoter therefor, at a temperature ranging from 100.degree. to 240.degree. C. and a pressure greater than atmospheric, and wherein (a) such reaction is carried out in the absence of a third reaction solvent and (b) the carbon monoxide partial pressure, measured at 25.degree. C., is less than or equal to 20 bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.