介孔钛硅分子筛TS-1的合成及催化环己酮氨肟化反应性能  

On the synthesization and performance evaluation of TS-1 molecular sieve for ammoximation of cyclohexanone

作　　者：李小玉[1] 蒋建平[1] 

机构地区：[1]中山火炬职业技术学院,广东中山528436

出　　处：《南昌大学学报（理科版）》2016年第5期474-477,共4页Journal of Nanchang University(Natural Science)

基　　金：广东省科技厅基金资助项目(2015A010105003)

摘　　要：采用水热法合成了钛硅分子筛TS-1,并对其进行扩孔改性。运用XRD、FT-IR、UV-vis、N2吸-脱附等温曲线法对改性前后TS-1进行表征分析,并考察了其对环己酮氨肟化反应的催化活性评。结果表明:实验制备的TS-1分子筛具有典型MFI拓扑结构,且钛原子已进入TS-1分子筛骨架形成活性中心。TPAOH扩孔改性后的TS-1分子筛具有介孔结构,对环己酮氨肟化反应的转化率和选择性分别提高了33.32%和31.83%,达98.73%和98.54%。此外,TS-1分子筛活性下降归因于分子筛孔道被有机物或积碳堵塞,经焙烧再生后可恢复其活性。The titanium silicon molecular sieve （TS-1） was synthesized by hydrothermal method, and the pore-enlarging modification on TS-1 was carried out subsequently. The TS-1 and modified TS-1 catalysts were characterized by XRD, FT-IR, UV-vis and Nz adsorption-desorption methods, and the catalytic activity on cyclohexanone ammoximation reaction was investigated. The results indicated that all of TS-1 we pre- pared possessed a typical MFI topology with titanium atoms entering into the TS-1 framework. The TS-1 modified by TPAOH has mesoporous structure,and its conversion and selectivity on cyclohexanone am- moximation reaction were significantly increased by 33.32% and 31.83% ,amounting to 98.73% and 98. 54% respectively. Furthermore,the activity of TS-1 zeolite molecular sieve was attributed to the decline in organic matter or deposition, and its activity could be regenerated by calcination.

关 键 词：钛硅分子筛 环己酮 氨肟化反应 催化 环己酮肟 

分 类 号：O643.32[理学—物理化学]