1. A process for preparing aromatic bisphenols, the process comprising:
reacting an aromatic hydroxy compound with an alkylating agent having a functionality of two in the presence of a catalyst
system, wherein the catalyst system is selected from the group consisting of a heteropolyacid compound, a clay, and a functionalized
metal oxide catalyst, and wherein the alkylating agent having the functionality of two comprises a carbonyl compound of formula
(I):
wherein R1 to R4 independently at each occurrence represent a hydrogen or an aliphatic radical, and “a” and “b” are integers independently
having values from 0 to 3.
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