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US 2024/0294452 A1Published application
Process for preparing bisphenol a (bpa) in the presence of cumene
AssigneeCovestro Deutschland AG
InventorsJerico Jayson Uy, Erik Sluyts
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Abstract
The present invention relates to a process for preparing bisphenol A in the presence of cumene without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst. Moreover, the present invention provides a process for preparing polycarbonate.
Claims12
A process for preparing ortho,para-, ortho,ortho- and/or para,para-bisphenol A comprising the step of
- (a) condensing raw phenol and raw acetone in the presence of a catalyst system, wherein the catalyst system comprises an ion exchange resin catalyst and a sulfur containing cocatalyst, wherein the amount of cumene present in step (a) is higher than 1 ppm with respect to the total weight of the raw acetone.
Dependencies are inferred from the claim text.