Liquid-phase Catalytic Oxidation of Benzyl Alcohol to Benzyl Aldehyde With Fe/La-HMS

摘要

Fe/La-HMS was in situ techniques synthesized by using sol-gel method at room temperature, and was characterized by XRD, SEM, H_2-TPR and N_2 adsorption measurements. Without any organic solvent, the catalyst was used in selective oxidation of benzyl alcohol with 30% aqueous hydrogen dioxide as the oxidant, and the effects of the amount of metal doping, reaction time, reaction temperature, catalyst dosage and dosage of oxidant on the oxidation of benzyl alcohol were examined. The results show that partial Fe~(3+) and La~(3+) ions were incorporated into the framework of HMS partially, and Fe/La-HMS had a uniform mesoporous structure. And at 80°C, when n(H_2O_2)/n(benzyl alcohol)=2:l, n(Fe)/n(La)=10:1, catalyst dosage 3% and reaction time 4 h, the conversion of benzyl alcohol and the selectivity of benzyl aldehyde reached 63.8% and 92.2%. At the same time, catalytic activity does not change after using three times.