【摘要】 采用水热法合成了V-AlPO5分子筛催化剂,通过XRD表征确定其具有AlPO-5微孔分子筛的晶体结构。不同合成条件对V-AlPO5分子筛的催化活性有一定影响,优化合成条件下制备的V-AlPO5分子筛,在以过氧化氢为氧化剂的苯羟基化制苯酚反应中表现出较佳的催化活性。反应温度55℃,乙腈6 mL,苯10 mmol,质量分数35%过氧化氢15 mmol,氧化剂用量0.2 g,共还原剂抗坏血酸0.2 g,反应24 h,苯酚收率可达16.1%,选择性为86.8%。更多还原

【Abstract】 V-AlPO5 molecular sieves synthesized by the hydrothermal method was confirmed by XRD patterns.The catalytic activity of V-AlPO5 toward the benzene hydroxylation was influenced by the different synthetic conditions.The catalyst prepared from the optimized condition showed a relative high reaction activity toward the probed reaction.The optimistic reaction conditions:0.2 g catalysts,0.2 g ascorbic acid,10 mmol benzene and 15 mmol 35%H2O2 were added in 6 mL acetonitrile,the reaction was kept for 24 h under 55 ℃.Under these conditions,the phenol yield was 16.1% with a selectivity of 86.8%.更多还原