以活性炭为载体,采用回流吸附法制备了负载型硅钼钒杂多酸催化剂,以冰醋酸作溶剂,过氧化氢作氧化剂,研究了由苯直接羟基化制苯酚的催化活性。结果表明,苯为2mL,冰醋酸为15mL,过氧化氢为5mL,当负载型杂多酸的用量为0.2g、反应温度70℃、反应时间60m in时,硅钼钒催化合成苯酚的收率可达7.4%,选择性达97.1%。 The activated carbon was used as support to prepare supported molybdosilicate vanadium heteropolyacid catalyst by refluxing. The catalytic activity of direct hydroxylation of benzene to phenol was studied using glacial acetic acid as solvent and hydrogen peroxide as oxidant. The results showed that the yield of phenol was 2mL for benzene, 15mL for glacial acetic acid and 5mL for hydrogen peroxide. When the amount of supported heteropoly acid was 0.2g, the reaction temperature was 70 ℃ and the reaction time was 60m in, Up to 7.4%, selectivity of 97.1%.