Process for the recovery of water-soluble hydroformylation catalysts containing rhodium

US4504588A · kind A · utility

Assignee

• Ruhrchemie Aktiengesellschaft · DE

Inventors

• Roderich Gartner · Dinslaken, DE
• Boy Cornils · Dinslaken, DE
• Ludger Bexten · Hünxe, DE
• Dieter Kupies · Duisburg, DE

Key dates

• Filing date: Sep 20, 1983
• Grant date: Mar 12, 1985
• Expiry date: Sep 20, 2003

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/96
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

To recover a hydroformylation catalyst system containing rhodium and phosphine, the aqueous solution containing the catalyst system is mixed with acid and then extracted with an amine which is dissolved in an organic solvent. The organic phase is separated and treated with the aqueous solution of an inorganic base, thereby recovering the catalyst in essentially pure form as an aqueous solution.