Abstract

Liquid-phase oxidation of styrene with hydrogen peroxide in the presence of a catalytic system based on (NH₄)₁₀W₁₂O₄₁ + Ce(NO₃)₃ + H₃PO₄, supported on a microstructured carbon material and treated with an aqueous Н₂О₂ solution, was studied. The major reaction products are phenyloxirane and benzaldehyde, with phenylacetaldehyde, 1-phenylethane-1,2-diol, and benzoic acid also present. The kinetic relationships of the process were studied, and a kinetic model according to which phenyloxirane is the primary reaction product was suggested. Aldehydes are accumulated by parallel routes: oxidation of phenyloxirane and of its hydrolysis product, 1-phenylethane-1,2-diol. With an increase in the styrene: Н₂О₂ molar ratio, oxidation of 1-phenylethane-1,2-diol becomes the major pathway of the aldehyde formation.

中文翻译：

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铈阳离子修饰的聚氧钨酸盐存在下苯乙烯与过氧化氢液相氧化的动力学关系

摘要

在基于（NH ₄）₁₀ W ₁₂ O ₄₁ + Ce（NO ₃）₃ + H ₃ PO ₄的催化体系存在下，用过氧化氢对苯乙烯进行液相氧化，负载在微结构碳材料上，并用水性Н ₂ О ₂解决方案，进行了研究。主要反应产物是苯环氧乙烷和苯甲醛，同时也存在苯乙醛，1-苯乙烷-1，2-二醇和苯甲酸。研究了该过程的动力学关系，并提出了以苯环氧乙烷为主要反应产物的动力学模型。醛通过平行途径积聚：苯环氧乙烷及其水解产物1-苯基乙烷-1，2-二醇的氧化。与增加的苯乙烯：Н ₂ О ₂ 1-苯基乙烷-1,2-二醇的摩尔比，氧化成为醛形成的主要途径。