Process for the separation and recovery of rhodium from the products of the oxo synthesis

US5294415A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Peter Lappe · Dinslaken, DE
• Ludger Bexten · Hünxe, DE
• Dieter Kupies · Duisburg, DE

Key dates

• Filing date: Jun 23, 1992
• Grant date: Mar 15, 1994
• Expiry date: Jun 23, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

To separate and recover rhodium, the distillation residues of oxo synthesis products are initially treated with an oxidant. Then the reaction mixture is reacted, in the presence of carbon monoxide (or a compound which splits off carbon monoxide), with an aqueous solution of a reagent forming a water-soluble complex compound with rhodium. The reaction mixture breaks into an organic phase and an aqueous phase, the complex goes to the aqueous phase as it is substantially insoluble in the organic phase.