Process for the preparation of hydroxybiphenyls
US4891452A · kind A · utility
3Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1988 |
| Grant date | Jan 2, 1990 |
| Priority date | — |
| Expiry date | Feb 10, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R13/516
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process for preparing hydroxybiphenyls. A bromobiphenyl is contacted with a base in aqueous liquid phase at a temperature less than or equal to 230.degree. C. in the presence of a copper-based catalyst. The hydroxyl ion concentration of base ranges from 0.1 to about 1.6 molar equivalents per liter. At temperatures less than 215.degree. C., a cocatalyst is preferably added.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.