Hydroformylation process utilizing an unmodified rhodium catalyst and the stabilization and regeneration thereof
US4400547A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1981 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Apr 10, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention concerns an oxo process, either batch or continuously operated, for the preparation of aldehydes, principally in relatively high proportions of branched isomer, from olefins and synthesis gas employing an unmodified rhodium catalyst feed or recycle such as the rhodium salts of organic carboxylic acids. More particularly the invention concerns such a process wherein at least a portion of the reaction medium, e.g., the oxo reactor effluent, is contacted with a ligandizing compound such as triphenylphosphine, prior to product recovery by distillation, such that the rhodium catalyst is converted to a stable form and not lost by plating out on the distillation column or base heater during the distillation. Thereafter, the catalyst is deligandized and regenerated by air treatment and reused in the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.