Catalytic And Non-Catalytic Selective Oxidation Of Styrene

Oxidation of styrene is a kind of classical organic reactions, the oxidation reaction occurred in their side chains on the carbon-carbon double bond. The side-chain carbon-carbon double bond lively open and fracture easily generate different oxidation products by the oxidizing agent.In this paper, based on the oxidation products of styrene, effects of reaction factors on catalytic and non-catalytic selective oxidation of styrene were investigated. The optimal conditions for styrene oxidation and possible reaction mechanism steps were outlined.1. Epoxidation of styrene by formamide-H2O2 system(1) In the absence of catalyst or solvent, styrene was epoxidated by the formamide-H2O2 system as the oxidizing agent.(2) Reaction factors such as H2O2 dosage, reaction time, reaction temperature, operating procedures and solvents had different effects on the oxidation of styrene.2. Catalytic oxidation of styrene to benzaldehyde over vanadium-molybdenum heteropoly compound.(1) Oxidation of styrene to benzaldehyde over the catalyst made by hydrothermal synthesis.(2) Vanadium-molybdenum heteropoly compound has high catalytic activity on the oxidation of styrene.(3) Reaction factors such as catalyst dosage, reaction temperature, H2O2 dosage, reaction time and operating procedures had different effects on the oxidation of styrene.3. Oxidation of styrene by formic acid-H2O2 system(1) In the absence of catalyst or solvent, styrene was oxidated by the formic acid-H2O2 system as the oxidizing agent.(2) Formic acid-H2O2 system had high oxidation and specificity.(3) Reaction factors such as H2O2 dosage, reaction temperature, reaction time and operating procedures had different effects on the oxidation of styrene.