Benzaldehyde was oxidized with hydrogen peroxide in the heterophase system with different ratios of benzene and water using selenium-based catalysts. For the reaction, which was carried out in the ratio of benzene:water = 4:1, Se-microgel proved to be a highly active colloidal catalyst and allowed to achieve 94.1 % yield of benzoic acid at 60 °C. The synthesized Se-modified microgel demonstrates exceptional catalytic activity in oxidation reactions at the interface in various heterophase systems at different temperatures.
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