气固相取代法制备Ti-β沸石 Ⅰ.母体脱铝处理的影响  

PREPARATION OF Ti ZEOLITES BY GASSOLID INTERACTION. Effect of Dealumination of the Zeolite Precursor

作　　者：张法智[1] 郭新闻[1] 王祥生 刘海鸥 王溟波 

机构地区：[1]大连理工大学碳资源综合利用开放实验室

出　　处：《催化学报》1999年第4期467-470,共4页

基　　金：国家自然科学基金;中国石油化工总公司资助

摘　　要：钛硅分子筛ＴＳ１在有稀双氧水（３０％）参与的多种有机化合物选择氧化反应中具有优异的催化性能，因而被认为是分子筛研究领域的一个里程碑［１］．但由于其拓扑结构所限，ＴＳ１孔道尺寸只有０５５ｎｍ左右，动力学直径大于０６ｎｍ的有机物分子难以扩散进入其...Ti zeolites have been prepared successfully by gassolid interaction using dealuminated as precursors which were well characterized by XRD, FTIR and UVVis techniques. FTIR spectra show that, as compared with that of precursors, the 960 cm-1 band of Ti zeolites becomes more intense, which is assigned to the incorporation of Ti atoms in the framework. UVVis spectra of Ti exhibit a strong transition at 210 nm, indicating that Ti atoms are tetrahedrally incorporated into the framework. With increasing dealumination of the precursors, the amount of extraframework TiO2 in the Ti zeolites gradually decreases. The results of epoxidation of olefins over Ti zeolites show that Ti zeolites occupy better catalytic performance for epoxidation of cyclohexene than TS1.

关 键 词：脱铝沸石 Ti-β沸石 烯烃 环氧化 催化剂 沸石 

分 类 号：O643.36[理学—物理化学]