WO_3/SiO_2催化氧化环戊烯合成戊二酸

Synthesis of glutaric acid via catalytic oxidation of cyclopentene over WO_3/SiO_2 catalysts

以偏钨酸铵为前驱体,SiO2为载体,采用超声-浸渍法制备了用于催化氧化环戊烯合成戊二酸的WO3/SiO2催化剂。采用红外吸收光谱(FT-IR)、XRD等手段对催化剂进行了表征。考察了WO3负载量、焙烧温度对催化剂性能的影响。结果显示:制备催化剂的适宜条件为WO3负载质量分数30%、焙烧温度500℃;合成戊二酸的最佳反应条件为反应时间6h、反应温度88℃。在此优化条件下,戊二酸的收率达65.9%。

WO3/SiO2 catalysts for synthesis of glutaric acid （GAC） via catalytic oxidation of cyclopentene were prepared by ultrasound impregnation method with ammonium metatungstate as precursor and SiO2 as support, and XRD, FT-IR and BET were used to characterize the catalysts. The effect of loading amount of WO3 and calcination temperature on the catalytic performance of the catalysts was investigated. The results showed that under the optimal reaction conditions of 6 hours and 88℃, the GAC yield could reach 65.9% over the catalyst prepared under the optimal conditions of calcination at 500℃ and WO3 loading 30% by mass.