含L沸石次级结构单元的介孔分子筛的合成  

Synthesis of mesoporous molecular sieves with secondary building units of L zeolite

作　　者：王姗[1] 窦志容[1] 李玉平[1] 闫子春[1] 李晓峰[1] 窦涛[1] 

机构地区：[1]太原理工大学精细化工研究所,山西太原030024

出　　处：《工业催化》2005年第2期51-54,共4页Industrial Catalysis

基　　金：国家自然科学基金资助项目 (2 0 1 73 0 3 9);中国石油天然气股份化工公司资助项目

摘　　要：以极低浓度n(CTAB)∶n(SiO2)=0 06的阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)为模板,以具有L沸石次级结构单元的溶胶为前驱体,在碱性条件下合成介孔分子筛L MCM 41。样品的XRD、FT IR、N2吸附脱附和NH3 TPD等表征结果表明,合成出的介孔分子筛是孔壁含有L沸石次级结构单元的六方晶相结构,该介孔分子筛的孔壁厚于常规水热方法合成的MCM 41的孔壁,具有较高的水热稳定性和较强的酸性。Mesoporous aluminosilicates with the structure of MCM-41 were synthesized in alkaline media using the cationic surfactants of CTAB of very low concentration(CTAB/SiO_2=0.06)as the template and the gel containing secondary building units of L zeolite as the precursors. XRD, FT-IR , N_2 adsorption-desorption isotherms and NH_3-TPD results indicated that the mesoporous molecular sieve synthesized has hexagonal structure with L zeolite secondary building units on its pore walls, which were thicker than those of MCM-41 synthesized by conventional hydrothermal method. The material exhibited high hydrothermal stability and strong　acidity .

关 键 词：介孔分子筛 L沸石次级结构单元 水热稳定性 酸性 

分 类 号：TQ424.25[化学工程]