| abstract |
The subject of the present invention is a method of preparation adipic acid by reaction of water and oxide of carbon on at least one pentene acid, in the presence of a catalyst based on iridium and at least one iodized promoter, at a temperature between 100 ° C and 240 ° C, under a pressure above atmospheric pressure, in at least a carboxylic acid chosen from carboxylic acids saturated aliphatics, aliphatic carboxylic acids ethylenic and aromatic carboxylic acids, with a maximum of 20 carbon atoms, the ratio atomic I / Ir being less than 10. |