Process for the manufacture of aldehydes

US4222966A · kind A · utility

Assignee

• Ruhrchemie Aktiengesellschaft · DE

Inventors

• Ludger Bexten · Hünxe, DE
• Boy Cornils · Dinslaken, DE
• Hans-Dieter Hahn · Oberhausen, DE
• Hans Tummes · Oberhausen, DE

Key dates

• Filing date: Aug 17, 1978
• Grant date: Sep 16, 1980
• Expiry date: Aug 17, 1998

Classification

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

Abstract

An improvement in the process for the continuous manufacture of an aldehyde by reaction of an olefin with carbon monoxide and hydrogen in the presence of a rhodium catalyst at an elevated temperature and pressure followed by distillative separation of the non-converted feedstocks and low boiling components of the reaction mixture, the improvement residing in employing a carbon monoxide/hydrogen mixture containing 2-20 ppm sulfur and recycling residual rhodium compounds, both dissolved and suspended in the distillation residue, to the reaction zone.