STUDY OF CHLOROHYDRINATION OF ALLYL CHLORIDE TO DICHLOROPROPANOL CATALYZED BY TITANIUM SILICALITE

Abstract

Abstract: Traditional methods of preparing dichloropropanol have many problems, such as serious environmental pollution, low utilization of chlorine atom and harsh reaction conditions. In this work, a new process for chlorohydrination of allyl chloride with H2O2 as the oxidant and HCl as the chlorine source in the presence of HTS zeolite was developed to produce dichloropropanol. The effects of catalyst type, material ratio, temperature and catalyst dosage on the conversion of allyl chloride and the selectivity of dichloropropanol in the product were investigated, and a reaction mechanism was proposed based on the results. HTS zeolite showed excellent performance in this catalytic chlorohydrination process and the reaction of HCl with the epoxidation intermediate on the surface of MFI-type tetracoordinated titanium was carried out by the interaction between HCl and HTS, and efficient conversion of allyl chloride to dichloropropanol.

Key words: catalytic chlorohydrination, dichloropropanol, slurry bed, allyl chloride, titanium silicalite

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