| abstract |
The present invention relates to a process for the preparation of adipic acid by reacting water and carbon monoxide with at least one pentene acid, in the presence of a catalyst based on iridium and at minus one iodinated promoter, at an elevated temperature, under a pressure above atmospheric pressure, in at least one solvent selected from the group consisting of saturated aliphatic or cycloaliphatic hydrocarbons and their halogenated derivatives, aromatic hydrocarbons and their halogenated derivatives, and aliphatic, aromatic or mixed ethers, the atomic ratio I / Ir being less than 20. |