Process for the purification of dihydroxybiphenyls
US5087768A · kind A · utility
1Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1990 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | Oct 1, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/86
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the purification of dihydroxybiphenyls, preferably 4,4'-dihydroxybiphenyl, by acylation of the preparation medium of the dihydroxybiphenyl and selective precipitation of the biphenyl diester (diacetylbiphenyl), followed by conversion of the biphenyl diester to dihydroxybiphenyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.