Process for preparing 4,4'-dihydroxybiphenyl
US5091592A · kind A · utility
0Cited by
0References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1991 |
| Grant date | Feb 25, 1992 |
| Priority date | — |
| Expiry date | Jan 16, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C39/15
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing 4,4'-dihydroxybiphenyl comprising oxidizing 4,4'-diisopropylbiphenyl with molecular oxygen and decomposing the resulting oxidation product in the presence of an acid catalyst is disclosed, in which oxidation of 4,4'-diisopropylbiphenyl is carried out in the presence of ammonia or an ammonium salt. The oxidation product has an increased selectivity of 4,4'-diisopropylbiphenyl dihydroperoxide and, therefore, produces the desired product in high yield upon acid decomposition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.