Preparation of adipic acid by hydrocarboxylation of pentenic aci

Details Preparation of adipic acid by hydrocarboxylation of pentenic aci Preparation of adipic acid by hydrocarboxylation of pentenic aci

1992-04-24

1993-07-13

Prescott, Arthur C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C07C 5114

Patent

active

052275221

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.

REFERENCES:
patent: 3816489 (1974-06-01), Craddock et al.
patent: 4861912 (1989-08-01), Drent et al.
patent: 4902822 (1990-02-01), Drent
patent: 5028576 (1991-07-01), Drent et al.
D. Forster et al, "Mechanistic Pathways in the Catalysis of Olefin Hydrocarboxylation by Rhodium, Iridium, and Cobalt Complexes", Catalysis Reviews, vol. 23, Nos. 1 and 2 (1981), pp. 89-105.

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