The reaction mechanism and synthesis process optimization of 2,3-dichloro-1,4-naphthoquinone prepared by catalytic chlorination with 1,4-naphthoquinone as raw materi-al,hydrogen chloride as catalyst and chlorobenzene as solvent were studied.The optimum synthesis conditions were determined as follows:reaction temperature 75℃,catalyst dosage 1.5 mL,solvent dosage 80 mL,raw material dosage 7.5 g,chlorination speed 15 mL·min-1,reaction time 1.5-2 h,product purity more than 99.5%.After repeated application of mother liquor,the yield of the product reached 91%—93%and the purity of the product was≥99.0%.
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