Abstract: A process for the continuous purification of crude bisphenol which comprises (1) forming a single liquid phase comprising a hot mixture of crude bisphenol and water in a ratio substantially of from about 75% to about 85% weight of crude bisphenol to about 15% to about 25% weight water; (2) continuously feeding this mixture together with a stream of warm water to a first crystallization zone at a temperature sufficient to maintain a bisphenol-rich liquid phase, a water-rich phase and a crystalline phase comprising about 70% to about 95% of the total bisphenol in the mixture; (3) passing the three-phase mixture of bisphenol and water to a second crystallization zone operated at about 85.degree. C. to about 97.degree. C. until about 90% to about 99% of the total bisphenol is crystallized; and (4) recovering the purified bisphenol crystals.

Abstract: A process for the preparation of crystals of an adduct of a bisphenol with a phenol which comprises:(a) adding an inert volatile liquid hydrocarbon diluent and 0-1.5% weight water to a crude mixture of the bisphenol and the phenol at a temperature above the boiling temperature of the added volatile liquid diluent; and(b) allowing the volatile liquid diluent to boil in the process, thereby cooling the resulting mixture of bisphenol and phenol to a temperature at which adduct crystals form.