关键词: 1, 4-二氯蒽醌, 合成, 氯转羟基, 机理

Abstract: 1,4-dihydroxyanthraquinone was obtained by boric acid catalytic hydrolysis of 1,4-dichloroanthraquinone，which was synthesized by using commercial phthalic anhydride and p-dichlorobenzene as raw materials. The effect of reaction temperature，sulfuric acid concentration (mass concentration)，molar ratio of reactants and reaction time on the chlorine hydroxylation reaction was investigated，and optimal experimental conditions were obtained as follows，temperature 220℃，sulfuric acid concentration 95%，molar ratio of sulfuric acid/1,4-dichloroanthraquinone/boric acid 37.5∶1.0∶1.4，reaction time 60min. Under above conditions，the yield of 1,4-dihydroxyanthraquinone was 71.0%. The possible mechanism of chlorine hydroxylation with the catalytic effect of boric acid was discussed.

Key words: 1,4-dihydroxyanthraquinone, synthesis, chlorine hydroxylation, mechanism