Catalyst composition and method for producing diaryl carbonates using nitrile as promoter
US6172254A · kind A · utility
23Cited by
5References
16Claims
0Family size
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Key dates
| Filing date | Jun 30, 1999 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Jun 30, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/824
- WIPO fieldChemical engineering
- 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 alkali metal or alkaline earth metal halide, preferably sodium bromide; and a promoter compound which is at least one C.sub.2-8 aliphatic or C.sub.7-10 aromatic mono- or dinitrile, preferably acetonitrile or adiponitrile. The catalyst system also preferably contains a compound of a non-Group VIIIB metal, preferably lead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.