How does Phenol&Acetone Condensation for BPA Production react?

Phenol and acetone undergo a condensation reaction under the catalysis of an acidic medium to generate Bisphenol A BPA. The main reaction is not complicated, and the reaction conditions are relatively mild. It can generally proceed smoothly at normal pressure and 60 - 90 °C. The production process of BPA is not long, mainly consisting of four parts: condensation reaction, adduct crystallization, phenol removal and purification, and mother liquor recovery. However, polycarbonate - grade BPA has very high quality requirements, requiring a purity of more than 99.5%, a phenol mass fraction of less than 5 × 10⁻⁵, an APHA color less than 20, and restrictions on freezing point, ash, iron ions, etc. Since Bisphenol A BPA is a heat - sensitive and oxygen - sensitive substance with a very high boiling point (360.5 °C), these characteristics bring many chemical engineering problems to the production of high - quality Bisphenol A BPA.