Process for the isolation of pentabromophenol
US4160112A · kind A · utility
4Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1978 |
| Grant date | Jul 3, 1979 |
| Priority date | — |
| Expiry date | Feb 13, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/70
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for isolating crude pentabromophenol containing occluded bromine and hydrogen bromide as impurities comprising the steps of contacting the crude pentabromophenol with a strong acid such as hydrobromic acid, sulfuric acid, hydrochloric acid and phosphoric acid; heating the mixture in order to remove excess bromine; and recovering of the pentabromophenol, whereby formation of carbonyl-group-containing impurities during isolation is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.