Oxidative secondary rhodium recovery process
US5100850A · kind A · utility
3Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 1991 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | May 3, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is an oxidative process for recovering rhodium catalyst values from "tars" formed during the preparation of acetic anhydride by the rhodium catalyzed carbonylation of a mixture of methyl iodide and methyl acetate and/or dimethyl ether. The disclosed process includes the treatment of a tar/methyl iodide solution, which contains rhodium values normally not extracted by aqueous hydrogen iodide, with a solution of hydrogen peroxide and acetic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.