高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (9): 1479.

• 论文 • 上一篇    下一篇

化学液相沉积与沸石疏水性

秦颖, 乐英红, 高滋   

  1. 复旦大学化学系, 上海, 200433
  • 收稿日期:1997-09-09 出版日期:1998-09-24 发布日期:1998-09-24
  • 通讯作者: 高滋
  • 作者简介:秦颖,女,22岁,硕士研究生.
  • 基金资助:

    国家攀登计划资助课题.

Chemical Liquid Deposition and Hydrophobicity of Zeolites

QIN Ying, YUE Ying-Hong, GAO Zi   

  1. Department of Chemistry, Fudan University, Shanghai, 200433
  • Received:1997-09-09 Online:1998-09-24 Published:1998-09-24

PDF (PC)

被引次数

18

摘要： 用SiCl4化学液相沉积法对丝光沸石和ZSM-5沸石进行了表面疏水化,并以正庚烷/水气相混合物竞争吸附法测定了沸石的疏水系数.研究了沸石原料类型、Si/Al比、预处理和沉积条件对疏水性的影响.对疏水化沸石样品的结构和物性进行了表征,测定了它们对含酚类废水的处理能力.经化学液相沉积的HZSM-5沸石(Si/Al比为100)的疏水性能超过了国产硅沸石.

关键词: 化学液相沉积, 疏水沸石, 废水处理

Abstract: Hydrophobic zeolites were prepared from mordenite and ZSM-5 by chemical liquid deposition with SiCl4. Hydrophobicity Index( Ih) of the zeolites was determined from the competition adsorption of gasous n-heptane and water under specific conditions. The influences of the nature and Si/Al ratio of the original zeolites, pretreatment and deposition conditions on hydrophobicity were studied. the hydrophobic zeolites were characterized with XRD, IR, NH3-TPDand N2 adsorption methods, and their adsorbability for phenolic compounds from waste water was tested. The hydrophobicity of HZSM-5(Si/Al ratio is 100) treated by chemical liquid deposition is better than the commercial silicalite prepared from highly siliceous HZSM-5 by severe steaming at high temperture. Its Ih value is 1.7 times higher and its adsorption capacity for p-cresol in dilute solution of 0.2—0.4 mmol/Lis 1.3—1.7 times greater as compared to commercial silicalite.

Key words: Chemical liquid deposition, Hydrophobic zeolites, Waste water treatment

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