Method of producing bisphenol A
US6414199B1 · kind B1 · utility
26Cited by
4References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 13, 2000 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Dec 13, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Provided is a method of producing bisphenol A in which the life of the acid-type ion-exchange resin used as a catalyst can be prolonged. The method comprises reacting phenol and acetone in the presence of an acid-type ion-exchange resin serving as a catalyst and an alkylmercaptan serving as a promoter to give bisphenol A, in which three or more reactors connected in series are used and all of phenol, all of an alkylmercaptan and a part of acetone are fed into the first reactor while the remaining acetone, divided into plural portions, is into all the second to the last reactors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.