高等学校化学学报

高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (5): 447.

• 研究论文 • 上一篇    下一篇

脱铝丝光沸石的制备和结构特征

张红浪, 李全芝, 胡家芬, 钟爱莲   

  1. 中国纺织大学纺化系
  • 收稿日期:1987-09-24 出版日期:1989-05-24 发布日期:1989-05-24
  • 通讯作者: 李全芝
  • 基金资助:

    国家自然科学基金

Preparation and Structure Characteristic of Dealuminized Mordenites

Zhang Honglang, Li Quanzhi, Hu Jiafen, Zhong Ailian   

  1. Department of Chemistry, Fudan University, Shanghai
  • Received:1987-09-24 Online:1989-05-24 Published:1989-05-24

PDF (PC)

被引次数

3

摘要： 用高温水蒸气结合酸洗的方法制备了SiO2/Al2O3为16～186的脱铝丝光沸石。用X光衍射和红外光谱法研究了它们的结构持征。随丝光沸石脱铝,晶格参数呈非线性和各向不同步收缩。由于α方向发生明显收缩,使椭园形主孔道的长轴方向缩小。其骨架振动频率自600～1300cm-1随着脱铝明显向高频方向漂移。当Al/u.c.自4脱至3时,丝光沸石的结构特征发生了明显的变化,可能与骨架上2位铝的脱除有关。当Al/u.c.≤3时,有新的Si—O—Si骨架生成,同时晶体重排为均匀有序的结构。

关键词: 丝光沸石, 脱铝, 结构特征

Abstract: The dealuminized mordenites with SiO2/Al2O3 in the range from 16 to 186 were prepared by the method of steam with acid leaching. Their structure characteristic was studied by X-ray diffraction and IR. The lattice parameters exhibit a nonlinearity and a pronounced anisotropy with the degree of dealumination. Since parameter "a" is obviously contracted, it makes the long axis of elliptical main channel of mordenite contracted.The vibration frequencies of zeolite framework at 600-1300cm-1 shifted to higher frequencies with dealumination. As Al/u.c. was changed from 4 to 3, the obvious change of the structure charactetistic occurred with the dealumination , it is probably related to the removal of the aluminum atoms of position "2" from the framework. When Al/u.c.≤3, the new Si-O-Si framework was formed and it was rearranged to a more orderly structure.

Key words: Mordenite, Dealumination, Structure characteristic

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