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1. (WO2018015923) MANUFACTURE OF BISPHENOL A

Pub. No.:    WO/2018/015923    International Application No.:    PCT/IB2017/054409
Publication Date: Fri Jan 26 00:59:59 CET 2018 International Filing Date: Fri Jul 21 01:59:59 CEST 2017
IPC: C07C 37/20
C07C 37/84
C07C 39/16
Applicants: SABIC GLOBAL TECHNOLOGIES B.V.
Inventors: OBRADOVIC, Branislav
Title: MANUFACTURE OF BISPHENOL A
Abstract:
The invention is directed to a method for the manufacture of bisphenol A, and to bisphenol A/phenol adduct crystals. The method of the invention comprises: a) reacting phenol and acetone in the presence of an acidic catalyst to form a reaction product comprising an initial concentration of bisphenol A and an initial concentration of impurities; b) diluting the reaction product with phenol, water and/or acetone, so as to decrease the impurity concentration to 50 % by weight or less of the initial concentration of impurities, and adding bisphenol A to increase the concentration thereof in the reaction product; and thereafter c) crystallising a bisphenol A/phenol adduct from the reaction product to produce a crystallised bisphenol A product.