AMINE MODIFIED CATALYSTS FOR BISPHENOL PRODUCTION

摘要

The acid catalyzed condensation of phenol with acetone in the presence of a thiol promoter to produce bisphenol A is found to occur with greater overall selectivity when the catalyst employed is an amine modified acidic resin catalyst. Amine modified acidic resin catalysts are prepared from acidic resins such as sulfonated polystyrene by neutralization of a portion of the acidic functional groups present with an amine such as pyridine. Where the thiol promoter is itself an amine the use of an amine such as pyridine as the modifying agent reduces the amount of thiol promoter required to achieve high selectivity.