Process and alkylmercaptoamine catalyst for production of bisphenol-A
US5075511A · kind A · utility
16Cited by
13References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1990 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Jun 19, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2231/347
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Bisphenol-A is prepared by reacting an excess of phenol with acetone in the presence of a modified sulfonic acid cationic exchange resin catalyst having a plurality of sulfonic acid sites of the general formula ##STR1## in which IER represents the ionic exchange resin backbone, each a and b is an integer from 0 to about 5, and each R is selected independently from H, OH, SH and alkyl groups. The catalyst exhibits high activity and selectivity at moderate reaction temperatures, low production of colored impurities, and high stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.