Process for preparing .alpha.,.omega.-dicarboxylic acids
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United States of America Patent
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Dec 13, 1988
Issued Date -
N/A
app pub date -
Feb 12, 1985
filing date -
Nov 10, 1978
priority date (Note) -
Expired
status (Latency Note)
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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.
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