Process for producing bisphenol A
US6737551B2 · kind B2 · utility
1Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 20, 2002 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Aug 20, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In the production of bisphenol A by condensation of phenol and acetone with the use of a cation exchange resin as a catalyst and optionally a free mercaptan as a promoter, the degree of conversion of phenol is maintained by increasing the molar ration of acetone/phenol with the deterioration of the cation exchange resin; with this method, bisphenol A can be effectively produced with industrial advantage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.