SiO_2负载钴取代磷钼钒杂多酸盐催化氧化环己烷反应  

Catalysis of cyclohexane oxidation with heteropolyacid salts of SiO_2-supported cobalt substitution for phosphorus,molybdenum,and vanadium

作　　者：马建军[1,2] 宋维维[1] 李贵贤[1] 滕志君[1] 高云艳[1] 张彩霞[1] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]甘肃银光聚银化工有限公司,甘肃白银730900

出　　处：《兰州理工大学学报》2011年第4期66-69,共4页Journal of Lanzhou University of Technology

基　　金：甘肃省教育厅科研基金(2005GJ0281)

摘　　要：采用超声波浸渍法制备系列负载型Dawson钴取代磷钼钒杂多酸盐,用傅里叶变换红外光谱、X射线衍射、比表面积测定等方法对催化剂进行表征,并将其用于催化环己烷选择氧化制备环己醇与环己酮的反应中.考察负载量、反应温度、时间以及过氧化氢用量对反应活性的影响.结果表明,3mol/L盐酸处理的硅胶在超声波浸渍条件下,催化剂CoH7P2Mo15V3O62/SiO2有较好活性.在温度75℃、环己烷用量0.1mol、35%CoH7P2Mo15V3O62/SiO20.3g、反应时间10h、w(H2O2)=50%的过氧化氢用量13.6g(0.2mol)时环己烷的转化率达到56.22%,环己醇和环己酮(简称KA油)总收率达到17.19%.Heteropolyacid salts of series supporter-type Dawson cobalt substitution for phosphorous,molybdenum,and vanadium were prepared with ultrasonic immersion method and the catalysts so obtained were characterized by using methods such as Fourier transform infrared spectroscopy,X-ray diffraction,and specific surface area determination.And these catalysts were used in the reaction of catalysis of cyclohexane selective oxidation to get cyclohexanol and cyclohexanon.The effect of different catalyst amount,reaction temperature,reaction time and the amount of H2O2 on reaction activity was investigated.The result showed that the silica gel processed with 3 mol/L HCl solution and ultrasonic immersion could make CoH7P2Mo15V3O62/SiO2 have better activity.The conversion of cyclohexane was 56.22% and the total yield of cyclohexanol and cyclohexanone was 17.19% under following conditions： the amount of cyclohexane was 0.1 mol,35%CoH7P2Mo15V3O62/SiO2 was 0.2 g,H2O2 with w（H2O2） being 50% was 13.6 g（0.2 mol）,reaction time was 10 h,and the temperature was 75 ℃.

关 键 词：负载型 磷钼钒钴杂多酸盐 环己烷 氧化 

分 类 号：TQ426.91[化学工程]