A process for the production of bisphenol-A having low concentration of
sulphur is disclosed. The process comprise a) reacting phenol with
acetone in the presence of a sulfonic acid ion exchanger to form a
product mixture containing water, bisphenol-A/phenol adduct, phenol and
sulfurous particles, and b) filtering the product mixture to separate the
sulfurous particles to obtain a purified product mixture that contains
water, phenol and bisphenol-A/phenol adduct. In one embodiment of the
process further comprise distilling the purified product mixture to
remove the water to obtain a first material system that contains said
adduct and phenol, crystallizing the adduct, and removing the phenol by
filtration using a filtering apparatus to obtain crystalline adduct. In a
yet additional embodiment the process comprise crystallizing the purified
product mixture to obtain a second material system that contains
crystalline adduct, water and phenol and removing the phenol and water by
filtration using a filtering apparatus to obtain crystalline adduct.