Cocatalysts for the synthesis of bisphenols
US5914431A · kind A · utility
28Cited by
9References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1997 |
| Grant date | Jun 22, 1999 |
| Priority date | — |
| Expiry date | Sep 17, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to the synthesis of bisphenols from monophenols and carbonyl compounds such as aldehydes and ketones using concentrated mineral acids such as hydrochloric acid and/or hydrogen chloride gas as acid catalysts and a mercaptan as cocatalyst, which is fixed by an ion pair bond to a matrix that is insoluble in the reaction medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.