acetic acid solution catalyzed by aluminum chloride, the successive reaction can proceed selectively, differing from the reaction without a catalyst. Under conditions of a bench-scale reactor, stirring being used, the relative flow rate of chlorine being 0.25 to 0.60, the concentration of BPA feed 10%, that of the catalyst more than 1%, and the reaction temperature 30 to 33°C, the selectivity of the catalyst for the formation of DCBPA and TCBPA was very high. The reaction apparently proceeded through three stages and TCBPA of high purity could be synthesized.
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