Process for hydroformylation using a catalyst based on cobalt and/or rhodium employed in a two-phase medium
US6469216B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Dec 7, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/50
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In an improved process for hydroformylation of olefinically unsaturated compounds using a catalyst based on cobalt and/or rhodium employed in a two-phase medium, a catalyst based on cobalt and/or rhodium is used dissolved in a non-aqueous ionic solvent which is liquid at a temperature of less than 90° C., in which the aldehydes formed are slightly soluble or insoluble. More particularly, the catalyst comprises at least one complex of cobalt and/or rhodium co-ordinated with at least one nitrogen-containing ligand and the non-aqueous ionic solvent comprises at least one quaternary ammonium and/or phosphonium cation and at least one inorganic anion. At the end of the reaction, the organic phase is generally separated and the ionic non-aqueous solvent phase containing the catalyst can be re-used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.