NH_4BF_4改性Y沸石的结构和性质  

Structure and Properties of Y Zeolites Modified by NH_4BF_4

作　　者：高滋[1] 徐金锁[1] 

机构地区：[1]复旦大学化学系

出　　处：《高等学校化学学报》1994年第5期651-654,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金;中国石油化学工业总公司资助

摘　　要：用ＮＨ_４ＢＦ_４溶液处理普通的Ｙ沸石后，得到了一系列不含Ｂ的脱铝Ｙ沸石．本文运用多种实验手段对它们进行了表征，并与其它改性方法得到的脱铝Ｙ沸石进行比较，发现这类Ｙ沸石脱铝羟基空穴较少，晶格热稳定性较高，且具有特殊的表面酸性分布，因而ＮＨ_４ＢＦ_４处理亦是一种有特色的Ｙ沸石改性方法．A series of dealuminated Y zeolites containing no boron in the framework were prepared by treating conventional NH4Y with aqueous solution of NH4BF4. The structure and properties of these dealuminated Y zeolites were characterized with various techniques and compared with other types of modified Y zeolites. It was found that these zeolites have less dealumination defects, higher thermostability and specific acid site distribution,NH4BF4treatment is a feasible modification method for preparing dealuminated Y zeolites with special features.

关 键 词：NH4BF4 改性 Y沸石 脱铝空穴 结构 

分 类 号：O647.33[理学—物理化学]