Calixarene bisphosphite ligand for use in hydroformylation processes
US7906688B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2008 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | Apr 3, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F15/0073
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A calixarene bisphosphite composition for use as a ligand in a transition metal-ligand complex catalyst and in a complex catalyst precursor. The ligand is especially useful in catalysts and catalyst precursors for hydroformylation processes wherein a raffinate stream comprising a mixture of alpha, beta, and iso-olefinic isomers is hydroformylated in the presence of carbon monoxide, hydrogen, and the transition metal-ligand complex catalyst to form a mixture of linear and branched aldehyde products. The complex catalyst selectively converts the alpha and beta olefin reactants more rapidly than the iso-olefin reactant resulting in an improved molar ratio of normal (linear) to branched aldehyde products. The unconverted iso-olefinic isomer is thereafter readily separated from the aldehyde product mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.