Preparation of butanedicarboxylic acid esters

Details Preparation of butanedicarboxylic acid esters Preparation of butanedicarboxylic acid esters

1979-07-19

1981-03-24

Helfin, Bernard

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

Organic compounds

Carboxylic acid esters

C07C 6738

Patent

active

042582032

ABSTRACT:
Multistep process for the preparation of butanedicarboxylic acid by the hydrogenation of carbon monoxide under pressure in the presence of a cobalt carbonyl catalyst, the improvement of heating at a temperature of 250.degree. to 350.degree. C. under superatmospheric pressure the resulting aqueous solution of cobalt carbonyl hydride that has been extracted with butadiene or with mixtures thereof before using in a subsequent step of the multistep process.

REFERENCES:
patent: 3778466 (1973-12-01), Matsuda
patent: 4169956 (1979-10-01), Kummer et al.
Matsuda, Bull. Chem. Soc. Japan, vol. 46 (1973), 524-530.

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