The Selective Oxidation of Styrene to Benzaldehyde by Modified VPO Catalyst
Zhuo Guanglan
Abstract
Zhuo Guanglan
Abstract
Selective oxidation of styrene was carried out using styrene as the raw material,30% hydrogen peroxide as the oxidant,and modified vanadium phosphate oxide as the catalyst.The results showed that nickel modified VPO significantly increased the selectivity of benzaldehyde.To investigate the nickel effect,the catalysts were characterized using X-ray diffraction,Fourier transform infrared spectroscopy,Field emission scanning electron microscope.Under the optimal conditions(acetonitrile as solvent,the amount of Ni-VPO catalyst is 5%,n(styrene)∶n(hydrogen peroxide)=1∶2,6 h,50 ℃),the convertion of styrene is 80.6%,and the selectivity of benzaldehyde is 74%.The reaction mechanism was also investigated.
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Selective oxidation of styrene was carried out using styrene as the raw material,30% hydrogen peroxide as the oxidant,and modified vanadium phosphate oxide as the catalyst.The results showed that nickel modified VPO significantly increased the selectivity of benzaldehyde.To investigate the nickel effect,the catalysts were characterized using X-ray diffraction,Fourier transform infrared spectroscopy,Field emission scanning electron microscope.Under the optimal conditions(acetonitrile as solvent,the amount of Ni-VPO catalyst is 5%,n(styrene)∶n(hydrogen peroxide)=1∶2,6 h,50 ℃),the convertion of styrene is 80.6%,and the selectivity of benzaldehyde is 74%.The reaction mechanism was also investigated.
Key concepts: Benzaldehyde, Chemistry, Styrene, Catalysis, Selectivity, Hydrogen peroxide, Styrene oxide, Vanadium