催化学报

催化学报 ›› 2012, Vol. 33 ›› Issue (1): 199-204.DOI: 10.3724/SP.J.1088.2011.10827

• 研究论文 • 上一篇    

天然丝光沸石多步脱铝-钛化制备钛硅分子筛

肖丽萍, 杨靖, 周慧, 陈春雨, 孙世烨, 楼辉, 郑小明*   

  1. 浙江大学化学系浙江省应用化学重点实验室, 浙江杭州 310027
  • 收稿日期:2011-08-11 修回日期:2011-10-17 出版日期:2012-01-16 发布日期:2015-05-26

Multi-step Dealumination and Incorporation of Titanium into the Framework of Natural Mordenite toward a Titanosilicate Catalyst

XIAO Liping, YANG Jing, ZHOU Hui, CHEN Chunyu, SUN Shiye, LOU Hui, ZHENG Xiaoming*   

  1. Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou; 310027, Zhejiang, China
  • Received:2011-08-11 Revised:2011-10-17 Online:2012-01-16 Published:2015-05-26

PDF

963

被引次数

11

摘要： 以优选的天然丝光沸石为原料, 采用多步脱铝-钛化法合成钛硅分子筛, 利用 X 射线粉末衍射、紫外-可见光谱、电感耦合等离子体原子发射光谱、N2 吸附-脱附法以及氨程序升温脱附等手段对其进行了表征, 并考察了它在苯乙烯氧化反应中的催化性能. 结果表明, 该方法可成功地将 Ti 同晶取代到天然丝光沸石的骨架中, 其 Si/Ti 达到 79, 且能稳定地保持天然丝光沸石的结构. 该钛硅分子筛在以 H2O2 水溶液为氧化剂的苯乙烯氧化反应中表现有良好的催化活性, 是商业 TS-1 催化剂的 75%, 具有一定的应用前景.

关键词: 天然丝光沸石, 脱铝, 钛化, 钛硅分子筛, 苯乙烯, 部分氧化

Abstract: Titanosilicates with low cost have been prepared via multi-step incorporation of titanium into natural mordenite (MOR) using natural MOR as the precursor. The resultant Ti-MOR was characterized by X-ray diffraction, inductive coupled plasma-atomic emission spectroscopy, diffused reflectance ultraviolet-visible spectroscopy, N2 adsorption-desorption, and temperature-programmed desorption of ammonia. The results showed that the framework of natural MOR remained during the treatment and the molar ratio of Si to Ti was low to 79. Furthermore, the well-dispersed 4-coordinated Ti was confirmed by UV-Vis spectra and the titanosilicate displayed appreciable activity in the selective oxidation of styrene using dilute H2O2 (30%) as oxidant.

Key words: natural mordenite, multi-step dealumination, titanation, titanosilicate, styrene, partial oxidation