Method for producing alkanals using a rhodium-tri-polyethylene glycolate

US6225508A · kind A · utility

Assignee

• Hoechst Research & Technology Deutschland GmbH & Co. KG · DE

Inventors

• Sandra Bogdanovic · Frankfurt am Main, DE
• Herbert Roesky · Göttingen, DE
• Uwe Ritter · Göttingen, DE
• Thomas Borrmann · Göttingen, DE

Key dates

• Filing date: Feb 15, 2000
• Grant date: May 1, 2001
• Expiry date: Feb 15, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/822
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

According to the invention, branched and straight chain alkenes and cycloalkenes with five and more C-atoms are by means of hydroformylation using a novel rhodium-tri-polyethylene glycolate of a polyethylene glycol with an average molecular weight of 320 to 650 as a catalyst with at hydrogen/carbon monoxide pressure of 60 to 200 bar and at a temperature of between 50 and 150.degree. C. converted into branched and straight chain alkanals and cycloalkanals with six and more C-atoms. The reaction is preferably carried out in water or polyethylene glycol or a mixture of the same as a solvent in the heterogeneous phase. The aldehydes obtained are easy to separate from the catalyst in the reaction preparation. Said aldehydes are also obtained with a high level of purity and a high yield.