Method for making bisphenol A
US7227046B2 · kind B2 · utility
13Cited by
3References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 8, 2002 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Sep 28, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The continuous process for manufacturing bisphenol A according to the invention, by reacting phenol and acetone in the presence of a strong acid catalyst and a co-catalyst, is carried out using as co-catalyst a dithio ether of general formula:in which the symbols R and R′ each represent a hydrogen atom, an alkyl radical or a phenyl radical, and the symbol R″ represents an optionally substituted alkyl radical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.