N-羟基邻苯二甲酰亚胺和Au/TiO<sub>2</sub>-SiO<sub>2</sub>高效催化氧化环己烷研究

N-羟基邻苯二甲酰亚胺和Au/TiO₂-SiO₂高效催化氧化环己烷研究

摘要: 采用沉积沉淀法制备出Au/TiO₂-SiO₂催化剂，使用X射线衍射（XRD）和透射电子显微镜（TEM）对其进行表征，进一步考察N-羟基邻苯二甲酰亚胺（NHPI）和Au/TiO₂-SiO₂作为催化剂对环己烷氧化性能的影响。结果表明，NHPI与Au/TiO₂-SiO₂质量比为1∶1，在150℃，氧气压力1.5 MPa下反应3 h，环己烷的转化率高到38.0%，酮醇选择性为79.4%。

Abstract: Au/TiO₂-SiO₂ catalyst was prepared by deposition-precipitation method and characterized with X-ray diffraction (XRD) and transmission electron microscopy (TEM). The effect of N-hydroxylphthalimide (NHPI) and Au/TiO₂-SiO₂ as catalysts on oxidation property of cyclohexane was also studied. It was found that cyclohexane conversion of 38.0% and selectivity to cyclohexanone and cyclohexanol of 79.4% were obtained under the condition of the mass ratio of the NHPI and Au/TiO₂-SiO₂ at 1:1, 150℃, reaction for 3 h and 1.5 MPa oxygen pressure.