Process for the manufacture of polyphenols
US7820866B2 · kind B2 · utility
3Cited by
4References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 2006 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Sep 2, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improved process for the manufacture of a polyphenol compound such as bisphenol-A by introducing into a reaction zone a phenolic compound reactant, a carbonyl compound reactant, and a catalyst promoter comprising bismethylthiopropane added to the reaction system in certain specific locations, and reacting the ingredients within the reaction zone in the presence of an acid catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.