Process for preparing aldehydes by hydroformylation

US6211414A · kind A · utility

Assignee

• Celanese GmbH · US

Inventors

• Sandra Bogdanovic · Frankfurt am Main, DE
• Helmut Bahrmann · Hamminkeln, DE
• Carl D. Frohning · Wesel, DE
• Ernst Wiebus · Oberhausen, DE

Key dates

• Filing date: Aug 31, 1999
• Grant date: Apr 3, 2001
• Expiry date: Aug 31, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/50
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention concerns a process for preparing aldehydes by reacting with hydrogen and carbon monoxide at a temperature of between 20 and 170.degree. C. and a pressure of between 1 and 300 bar an olefinically unsaturated C.sub.3 -C.sub.5 compound in the presence of an aqueous phase containing rhodium and sulphonated triarylphosphines as catalyst and between 1 and 35 wt % of a compound of formula (1), R(OCH.sub.2 CH.sub.2).sub.n OR.sup.1, R standing for hydrogen, a straight-chain or branched C.sub.1 -C.sub.4 alkyl group or a C.sub.1 -C.sub.4 hydroxyalkyl group, R.sup.1 standing for hydrogen or a methyl group, and n standing for an integer from 3 to 50.