Process for recovering rhodium

US5085835A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Jurgen Weber · Oberhausen, DE
• Ludger Bexten · Hünxe, DE
• Dieter Kupies · Duisburg, DE
• Peter Lappe · Dinslaken, DE
• Helmut Springer · Dinslaken, DE

Key dates

• Filing date: Aug 20, 1991
• Grant date: Feb 4, 1992
• Expiry date: Aug 20, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S423/14
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for recovering rhodium from an aqueous solution containing its complex compounds and optionally complex ligands in the presence of a water-soluble salt of a carboxylic acid by treatment of the aqueous solution at 20.degree. to 120.degree. C. with hydrogen peroxide (or a substance forming hydrogen peroxide) and with oxygen (or an oxygen-containing gas). The rhodium is then removed as a water-insoluble compound.