Process for the preparation of tetrabromobisphenol A
US7834221B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 3, 2006 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Jul 7, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing tetrabromobisphenol A, which comprises: i) reacting bisphenol A and bromine in dichloromethane in the presence of aqueous hydrogen peroxide at a temperature in the range of room temperature to the reflux temperature, wherein said dichloromethane is present in an amount sufficient for substantially dissolving brominated derivatives of said bisphenol A formed thereby, ii) separating the substantially solid-free reaction mixture obtained in step i) into aqueous and organic phases, precipitating tetrabromobisphenol A from the organic phase and isolating said precipitated tetrabromobisphenol A from said organic phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.