Process for purifying crude tetrabromobisphenol sulfone by extraction
US5008458A · kind A · utility
1Cited by
7References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Dec 19, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C315/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Crude tetrabromobisphenol S compositions can be purified by extracting impurities therefrom with a quantity of organic solvent which is insufficient to substantially dissolve the tetrabromobisphenol S, followed by the removal of the tetrabromobisphenol compound from the solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.