High productivity bisphenol-A catalyst
US6730816B2 · kind B2 · utility
16Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 27, 2001 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Nov 27, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2231/347
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A high productivity catalyst for bisphenol-A has been discovered which comprises strongly acidic cation-exchange resin spheres produced from a polystyrene/divinylbenzene (PS/DVB) copolymer sulfonated under conditions to introduce sulfone cross-linking. Surprisingly, the sulfone cross-linking improves the resistance to deformation but does not have a negative effect on the activity and selectivity of the catalyst in bisphenol-A production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.