Catalytic Effect Of SO₄^2--Fe-V/ZrO₂ Complex On Selective Oxidation Of Styrene To Benzaldehyde

Benzaldehyde is an important chemical raw material and is widely used in industrial production and life.In this work,hydrogen peroxide was used as the oxidant,and SO₄^2--Fe-V/Zr O₂ was used as the catalyst to promote the catalytic oxidation of styrene to benzaldehyde by hydrogen peroxide.In this paper,SO₄^2--Fe-V/ZrO₂ materials were prepared by impregnating FeC₁₃.6H₂ O,NH₄VO₃ and ZrO₂ precursors in H₂SO₄ solution.The conditions for the optimal synthesis of SO₄^2--Fe-V/ZrO₂ materials: during the calcination process.The heating rate was 2 K / min,the temperature was 600℃,and the calcination was performed for 5 h.XRD,FT-IR,SEM,TEM,XPS and N₂ adsorption-desorption characterization were used to determine the phase composition and structural properties of the material.The results show that SO₄^2-,V₂O₅ and Fe₂(V₄O₁₃)crystals are supported on the carrier ZrO₂.The prepared composite material was used as a catalyst,and an aqueous solution of H₂O₂ was used as an oxidant to oxidize styrene to benzaldehyde without solvent,and showed high activity and selectivity.The effects of different preparation conditions and reaction conditions on the catalytic oxidation activity of styrene were investigated,and the optimal catalytic oxidation conditions were optimized: the molar ratio of styrene / hydrogen peroxide at 80℃ in water was 4 hours.Under the conditions,the conversion of styrene was 62.32%,and the selectivity of benzaldehyde was 70.87%.