高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (5): 651.

• 论文 • 上一篇    下一篇

NH4BF4改性Y沸石的结构和性质

高滋, 徐金锁   

  1. 复旦大学化学系, 上海, 200433
  • 收稿日期:1993-09-13 修回日期:1993-11-10 出版日期:1994-05-24 发布日期:1994-05-24
  • 通讯作者: 高滋,女,60岁,教授,博士导师.
  • 作者简介:高滋,女,60岁,教授,博士导师.
  • 基金资助:

    国家自然科学基金;中国石油化学工业总公司资助

Structure and Properties of Y Zeolites Modified by NH4BF4

GAO Zi, XU Jin-Suo   

  1. Department of Chemistry, Fudan University, Shanghai, 200433
  • Received:1993-09-13 Revised:1993-11-10 Online:1994-05-24 Published:1994-05-24

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摘要： 用NH4BF4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NH4BF4处理亦是一种有特色的Y沸石改性方法。

关键词: NH4BF4改性Y沸石, 脱铝空穴, 热稳定性, 酸性分布

Abstract: A series of dealuminated Yzeolites 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 Yzeolites. It was found that these zeolites have less dealumination defects, higher thermostability and specific acid site distribution,NH4BF4 treatment is a feasible modification method for preparing dealuminated Yzeolites with special features.

Key words: NH4BF4 modified Y zeolite, Dealumination defects, Thermal stability, Acid site distribution

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