Method for extending the activity of acidic ion exchange catalysts
US5414152A · kind A · utility
23Cited by
12References
11Claims
0Family size
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Key dates
| Filing date | May 10, 1994 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | May 10, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The addition of 3-mercaptopropionic acid or the organic ester thereof to the reaction mixture slows the rate of deactivation of cationic catalyst resins containing mercaptan promoter sites, during preparation of bisphenols by the condensation of a ketone with a phenol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.