Preparation of pentenoic acids via hydroxycarbonylation of butad

Details Preparation of pentenoic acids via hydroxycarbonylation of butad Preparation of pentenoic acids via hydroxycarbonylation of butad

1996-04-22

1998-06-09

Ramsuer, Robert W.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5114

Patent

active

057636559

ABSTRACT:
Pentenoic acids are selectively prepared via hydroxycarbonylation of butadiene with carbon monoxide and water, at a temperature above 30.degree. C., under a partial pressure of carbon monoxide, measured at 25.degree. C., equal to or greater than 0.5 bar, in the presence of a catalytically effective amount of an iridium-based catalyst and an iodine-containing or bromine-containing promoter therefor, in a solvent medium, wherein the iodine or bromine/iridium molar ratio is less than or equal to 20/1 and the concentration by weight of water in the reaction mixture is less than or equal to 8%.

REFERENCES:
patent: 3579551 (1971-05-01), Craddock et al.
patent: 3816489 (1974-06-01), Craddock et al.
patent: 4000170 (1976-12-01), Forster et al.

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