Patent · US Expired

Method for recovering rhodium from reaction products of oxosynthesis

US6685896B2 · kind B2 · utility

1Cited by

4References

13Claims

0Family size

Assignee

CELANESE CHEMICALS EUROPE GMBH · DE

Inventors

Hans Bohnen · Niedernhausen, DE
Richard Fischer · Hartland, US
Mark Hewlett · Bay City, US
Wolfgang Zgorzelski · Oberhausen, DE
Norbert Schopper · Duisburg, DE

Key dates

Filing date	Sep 5, 2002
Grant date	Feb 3, 2004
Priority date	—
Expiry date	Sep 5, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/584
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a method for separating and recovering rhodium from reaction products of oxosynthesis, especially reaction products containing cobalt. The invention also relates to the reuse of rhodium as a catalyst for hydroformulation and to a catalyst for hydroformulation itself. The inventive method is characterized by the following: extraction of the organic solution with an aqueous phosphate solution or a phosphate solution, water washing, oxidative treatment of the organic phase, and extraction of the organic phase with an aqueous water-soluble arylphosphine solution.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.