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US 4,537,987 AGranted
Preparation of pure monoesters of adipic acid
AssigneeBASF SE
InventorsHeinz-Walter Schneider, Wolfgang Richter, Walter Disteldorf, Rudolf Kummer
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Abstract
Pure monoesters of adipic acid are prepared by a process in which (a) a pentenoate is reacted with carbon monoxide and hydrogen at from 90.degree. to 140.degree. C. and under from 5 to 300 bar in the presence of a carbonyl complex of cobalt or of rhodium, and a 5-formylvalerate is separated off, and (b) the 5-formylvalerate thus obtained is oxidized with molecular oxygen, or with a gas containing this, at from 20.degree. to 100.degree. C. under from 1 to 10 bar.
Claims5
A process for the preparation of a pure monoester of adipic acid, wherein
- (a) a pentenoate is reacted with carbon monoxide and hydrogen at from 90.degree. to 140.degree. C. and under from 5 to 300 bar in the presence of a carbonyl complex of cobalt or of rhodium, said pentenoate being an alkyl ester of 1-12 carbon atoms, a cycloalkyl ester of 5-12 carbon atoms, an alkaryl ester of 7-9 carbon atoms or a phenyl ester, and a 5-formylvalerate is separated off, and
- (b) the 5-formylvalerate thus obtained is oxidized with molecular oxygen, or with a gas containing this, at from 20.degree. to 100.degree. C. under from 1 to 10 bar.
Dependencies are inferred from the claim text.