Iron-based Catalyst For Styrene Selective Oxidation

This article prepared two different catalysts by hydrothermal method. And the catalyticactivity of two types of catalysts was studied in the oxidation of styrene to benzaldehydeusing30%H2O2as oxidizing reagent.(1)Fe3O4@C catalysts were prepared from glucose and Fe(acac)3by a one-pothydrothermal. These catalysts were characterized by XRD, XPS, SEM, and FT-IR. The testresults showed that Fe(acac)3participated in the carbonization process of glucose and theformation of Fe3O4was highly dispersed in carbon matrix. The catalytic activity of Fe3O4@Cwas studied in the oxidation of styrene to benzaldehyde using30%H2O2as oxidizing reagent.The styrene conversion and benzaldehyde slectivity under optimal conditions were90.3%and68.2%, respectively.The Fe3O4@C catalyst was recycled for three times without loss ofactivity.(2)FeCl3colloid catalyst and FeCl3/PVP colloid catalyst were prepared by hydrothermalmethod. These catalysts were characterized by XRD, TEM. the results showed that underhydrothermal treatment conditions the amount of PVP1.3g, hydrothermal temperature100℃,time2h, the high-stability colloidal catalyst were prepared. The FeCl3/PVP colloidal catalystexhibits high catalytic activity for oxidation of styrene to benzaldehyde. under the optimizedreaction condition: n(H2O2):n(styrene)=3:1, the dosage of catalyst0.8ml,60℃,6h,weobtained92.4%styrene conversion and68.2%selectivity of benzaldehyde.