Catalyst composition and method for producing diaryl carbonates, using bisphosphines
US6215015A · kind A · utility
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19Claims
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Key dates
| Filing date | Apr 17, 2000 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Apr 17, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C68/01
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Hydroxyaromatic compounds such as phenol are carbonylated with oxygen and carbon monoxide in the presence of a catalyst system comprising a Group VIIIB metal, preferably palladium; an iodide salt, preferably sodium iodide; and at least one organic bisphosphine such as 1,3-bis(diphenylphosphino)propane or 1,4-bis(diphenylphosphino)butane. The catalyst system also preferably contains a compound of cerium or lead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.