Preparation of pentenoic acids via hydroxycarbonylation of butadiene
US5763655A · kind A · utility
7Cited by
3References
18Claims
0Family size
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Key dates
| Filing date | Apr 22, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Apr 22, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Pentenoic acids are selectively prepared via hydroxycarbonylation of butadiene with carbon monoxide and water, at a temperature above 30.degree. C., under a partial pressure of carbon monoxide, measured at 25.degree. C., equal to or greater than 0.5 bar, in the presence of a catalytically effective amount of an iridium-based catalyst and an iodine-containing or bromine-containing promoter therefor, in a solvent medium, wherein the iodine or bromine/iridium molar ratio is less than or equal to 20/1 and the concentration by weight of water in the reaction mixture is less than or equal to 8%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.