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设计了一种反应控制相转移催化剂K3 PV4O2 4,用于催化以过氧化氢为氧化剂的苯氧化制苯酚反应 .此催化剂既可象均相催化剂那样进行催化反应 ,又可象多相催化剂那样进行回收利用 ,从而解决了均相催化剂难回收的问题 .在反应体系中 ,红色的钒磷杂多酸盐可溶于溶剂中 ;当过氧化氢消耗尽时 ,红色的钒磷杂多酸盐被还原成蓝色的钒磷杂多蓝并以沉淀形式从溶液中析出 ,从而可方便地回收利用 .苯氧化反应得到的主要产物为苯酚和水 ,副产物为氧 .在 313K下 ,苯的转化率可达到4 8% ,苯酚的选择性可达到 99%以上 .
A reaction-controlled phase-transfer catalyst, K3 PV4O2 4, was designed to catalyze the phenol oxidation of phenol with hydrogen peroxide as oxidant. This catalyst can be catalyzed either as a homogeneous catalyst or as a heterogeneous catalyst Recycling, thus solving the problem of difficult recovery of homogeneous catalyst in the reaction system, the red vanadium phosphorus heteropoly acid salt is soluble in the solvent; when hydrogen peroxide depleted, the red vanadium phosphorus heteropoly acid salt was Reduced to blue vanadium phosphorus heteropoly blue and precipitated from the solution as a precipitate form, which can be easily recycled. The main products of benzene oxidation reaction of phenol and water, byproduct of oxygen at 313K, benzene conversion The rate can reach 48%, the selectivity of phenol can reach more than 99%.