三氧化钨催化氧化环己烯合成己二酸

无需有机溶剂、酸性配体及相转移剂,以30%H2O2为氧源,单独使用三氧化钨作催化剂催化氧化环己烯合成己二酸即可达到较高的产率和纯度。当三氧化钨用量为5.0m m ol,W O3:环己烯:H2O2的摩尔比为1:40:176时,在回流温度下反应6h,己二酸分离产率为75.4%,己二酸纯度99.8%。三氧化钨催化剂重复使用4次,己二酸的分离产率仍可达到70%以上。结合FTIR和XRD分析证明了三氧化钨催化氧化环己烯反应过程中催化剂的结构稳定性和重复使用性。

Direct Oxidation of Cyclohexene to Adipic Acid Catalyzed by WO3

In the absence of organic solvent,acidic ligand and phase-transfer catalyst,synthesis of adipic acid by WO3 catalyzed oxidation cyclohexene with 30 percent hydrogen peroxide can be performed with higher yields and purities.Under the condition of 5 mmol WO3,1:40:176 mole ratio of WO3:C6H10:H2O2, refluxing temperature and 6 h reaciton time,the isolated yield of adipic acid reaches 75.4% and it purity is 99.8%. WO3 catalyst can be reused for 4 times and the isolated yield of adipic acid is still above 70%.The results of FTIR and XRD analysis show that the structure of the recycling WO3 catatlys is stable.