Rhodium catalysts and methods of preparation and use thereof

US4795727A · kind A · utility

Assignee

• Ruhrchemie Aktiengesellschaft · DE

Inventors

• Hanswilhelm Bach · Oberhausen, DE
• Helmut Bahrmann · Hamminkeln, DE
• Boy Cornils · Dinslaken, DE
• Werner Konkol · Oberhausen, DE
• Ernst Wiebus · Oberhausen, DE

Key dates

• Filing date: May 8, 1987
• Grant date: Jan 3, 1989
• Expiry date: May 8, 2007

Classification

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

Abstract

A process for the preparation of a rhodium catalyst comprising dissolving a carboxylic acid salt of rhodium in a solvent taken from the class consisting of aliphatic, cycloaliphatic, aromatic hydrocarbons and mixtures thereof. The carboxylic acid has 2 to 18 carbon atoms. This salt is reacted with carbon monoxide and hydrogen to form a rhodium hydridrocarbonyl which is reacted with an aqueous solution of a triaryl phosphine. The aqueous solution may be present during the initial reaction of the rhodium salt or may be added thereafter. A catalyst which is the product of the foregoing process is also disclosed, as is a method of producing aldehydes using the catalyst.