Method of producing aromatic carbonate
US5498789A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1994 |
| Grant date | Mar 12, 1996 |
| Priority date | — |
| Expiry date | Nov 28, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C68/01
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a method of producing an aromatic carbonate by reacting an aromatic hydroxy compound, carbon monoxide and oxygen using a catalyst system for suppressing the production of aryl aromatic o-hydroxycarboxylate as a by-product. The catalyst system consists of the following compounds: PA1 (A) at least one selected from palladium and palladium compounds; PA1 (B) at least one selected from lead compounds; and PA1 (C) at least one halide selected from quaternary ammonium halides and quaternary phosphonium halides; and if required, PA1 (D) at least one selected from copper and copper compounds. The method of the present invention can increase the yield of an aromatic carbonate per palladium (the turnover number of palladium).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.