What is the Bisphenol A BPA Crystallization Process of Ion Exchange Resin Method?

Bisphenol A bpa Crystallization Process of Ion-Exchange Resin Method
There are many patent technology providers for producing bisphenol A by the ion-exchange resin method.In the reactor effluent of each patented technology, p,p-bisphenol A BPA is the required BPA product, while o,p-BPA is the main impurity, which affects the color of the product and results in a high yellowness index (YI) value.
When removing impurities from the reaction product, each patented technology adopts adduct crystallization separation technology to obtain high-quality bisphenol A bpa products that meet the production requirements of polycarbonate (including optical grade).
Crystallization technologies are divided into two categories. One category adopts a two-stage phenol crystallization process; the other category adopts a phenol crystallization process in the first stage and a water crystallization process in the second stage.