水热晶化法合成Ti-MCM-41分子筛的研究  

Synthesis of Ti-MCM-41 Molecular Sieves by Hydrothermal Crystallization

作　　者：郭建维[1] 刘卅[2] 

机构地区：[1]广东工业大学轻工化工学院,广州510090 [2]华南理工大学材料学院,广州510640

出　　处：《广州化工》2004年第2期25-27,共3页GuangZhou Chemical Industry

基　　金：国家自然科学基金资助项目 (2 0 0 2 6 0 0 5 )

摘　　要：采用水热晶化法合成了含钛中孔分子筛Ti-MCM - 4 1,系统考察了凝胶 pH值、表面活性剂浓度、表面活性剂链长对所合成Ti-MCM - 4 1分子筛结构的影响。采用XRD、UV -Vis及N2 吸附 -脱附等温线等分析测试方法表征了分子筛结构。比较研究了Ti-MCM - 4 1与微孔分子筛TS - 1、TS - 2对烯烃的催化氧化性能。结果表明 :凝胶 pH在 11～ 12之间 ,表面活性剂C16TMABr浓度为 2 5 % (70 % ,表面活性剂所含碳原子数在 12～ 16时有利于合成有序度较高的六方中孔结构Ti-MCM - 4 1分子筛。与微孔分子筛TS - 1、TS - 2不同 ,Ti-MCM - 4 1分子筛可以催化较大分子烯烃的液相氧化。Mesoporous molecular sieves Ti-MCM-41 were synthesized by hydrothermal crystallization. Influences of PH of the gel, concentration of surfactant, chain length of surfactant were investigated respectively. The structures of Ti-MCM-41 molecular sieves were characterized by XRD,UV-Vis, element analysis and N 2 adsorption-desorption. The results showed that the high-ordered Ti-MCM-41 molecular sieves could be synthesized under the following conditions: PH of gel: 11～12, concentration of surfactant: 为25 %(70 %, chain length of surfactant: 12～16. Unlike TS-1 and TS-2 molecular sieves, Ti-MCM-41 molecular sieves could be used as the catalysts in catalytic oxidation reactions of the larger alkene moleculars.

关 键 词：水热晶化法 合成 Ti-MCM-41分子筛 催化氧化 凝胶pH值 表面活性剂浓度 链长 结构 

分 类 号：TQ426.65[化学工程] TQ424.25