METHOD OF TRANSFORMING BY-PRODUCTS IN THE PROCESS OF SYNTHESIS OF BISPHENOL A

摘要

A method of transforming by-products in the process of synthesis of bisphenol A characterized in that a solution of by-products and p,p'-BPA in phenol, containing not more than 18% of the p,p'-BPA isomer, not more than 0.5% of water and not less than 0.15 mol of the o,p'-BPA isomer per 1 mol of p,p'-BPA and at least 0.01 mol of trisphenols per 1 mol of p,p'-BPA is contacted at a temperature of at least 60°C and up to 80°C as well as at a volumetric and spatial flow rate of up to 2.0 m3/(rri3 k.h) with macroporous, sulphonic ion-exchange resin in the hydrogen form with bimodal ion structure, and the total volume of pores with a radius not greater than 20 nm in the resin is less than 0.5 ml/g, while the total volume of pores with a radius of 20 nm to 100 nm is greater than 0.8 ml/g.