Catalyst composition and method for producing diaryl carbonates using amide as promoter
US6180812A · kind A · utility
21Cited by
14References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1999 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Aug 27, 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 VIII metal having an atomic number of at least 44, preferably palladium; an alkali metal or alkaline earth metal halide, preferably sodium bromide; at least one carboxylic acid amide such as N-methylpyrrolidone or dimethylacetamide; and a cocatalyst which is a compound of one or more metals including copper, titanium, zinc, lead, cerium and manganese.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.