Process for preparing .alpha.,.omega.-dicarboxylic acids

Details Process for preparing .alpha.,.omega.-dicarboxylic acids Process for preparing .alpha.,.omega.-dicarboxylic acids

1985-02-12

1988-12-13

Lone, Werren B.

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

Organic compounds

Carboxylic acids and salts thereof

562524, C07C 51235, C07C 5116

Patent

active

047912286

ABSTRACT:
A process for preparing .alpha.,.omega.-dicarboxylic acids of the formula OC--(CH.sub.2).sub.n --COOH in which n=6 to 10 is disclosed. The process consists of the catalytic oxidation of a compound of formula X--(CH.sub.2).sub.n --CHO wherein X is CHO or COOH and n is 6 to 10 by O.sub.2 pure or in mixture with inert gas, possibly under pressure, in at least one polar solvent, at a temperature comprised between 20.degree. and 90.degree. C. and in the presence of a catalyst. The catalyst is chosen from the group consisting of at least one cobalt (II) salt and one ferrous salt. The amount of the catalyst is .ltoreq.0.001 mol % calculated on the equivalents of the aldehyde groups in the starting compound.

REFERENCES:
patent: 2777865 (1957-01-01), Logan
patent: 3043872 (1962-07-01), Roberts et al.
patent: 3714244 (1973-01-01), Okada et al.
patent: 3804895 (1974-04-01), Schwab

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