Patent ID: 8445731

Claim:
A process for producing a bisphenol compound which comprises: feeding a phenol compound and a carbonyl compound to a reactor packed with an acidic catalyst to produce the bisphenol compound, wherein the acidic catalyst is a sulfonic-acid-form cation-exchange resin in which part of the sulfo groups have been modified with at least any one of 2-pyridylalkanethiol compounds and 3-pyridylalkanethiol compounds and that the phenol compound and the carbonyl compound are continuously fed to the reactor packed with the acidic catalyst, and wherein at least part of the phenol compound is a phenol compound obtained when a bisphenol compound was purified, and wherein the phenol compound comprises phenol and at least one of bisphenol A, 2,4′-bisphenol A and p-isopropylphenol.