Preparation of adipic acid by hydrocarboxylation of pentenic acids
US5227522A · kind A · utility
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4References
16Claims
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Key dates
| Filing date | Apr 24, 1992 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Apr 24, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Adipic acid is selectively prepared by reacting water and carbon monoxide with at least one pentenic acid, in the presence of an iridium-based catalyst and at least one iodine-containing promoter therefor, at an elevated temperature, at a pressure greater than atmospheric pressure, in a reaction medium comprising at least one saturated aliphatic carboxylic acid, ethylenically unsaturated aliphatic carboxylic acid or aromatic carboxylic acid having not more than 20 carbon atoms, with the I/Ir atomic ratio being less than 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.