Preparation of adipic acid by hydrocarboxylation of pentenic aci

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

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C07C 5114

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054203465

ABSTRACT:
Adipic acid is selectivity prepared by reacting water and carbon monoxide with at least one pentenic acid, in the presence of a catalytically effective amount of an iridium-based catalyst and at least one iodinated promoter therefor at an elevated temperature, at a pressure greater than atmospheric and in at least one solvent medium which comprises a saturated aliphatic or cycloaliphatic hydrocarbon or halogenated derivative thereof, an aromatic hydrocarbon or halogenated derivative thereof, or an aliphatic, aromatic or mixed ether, and wherein the I/Ir atomic ratio is less than 20.

REFERENCES:
patent: 3579551 (1971-05-01), Craddock et al.
patent: 3816490 (1974-06-01), Forster
patent: 4788333 (1988-11-01), Burke
Catalysis Reviews, vol. 23, No. 1&2, (1981) pp. 89-105.

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