高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (1): 89.

• 论文 • 上一篇    下一篇

SDY型沸石的浸取处理及其对催化性能的影响

傅军1, 鲍书林2, 吴鹏2, 须沁华2   

  1. 1. 复旦大学化学系, 上海, 200433;
    2. 南京大学化学系
  • 收稿日期:1993-02-13 修回日期:1993-08-07 出版日期:1994-01-24 发布日期:1994-01-24
  • 通讯作者: 傅军,男,29岁,博士后.
  • 作者简介:傅军,男,29岁,博士后.
  • 基金资助:

    国家自然科学基金

The Leaching Treatment of SDY Zeolite and Its Influence on Catalytic Properties

FU Jun1, BAO Shu-Lin2, WU Peng2, XU Qin-Hua2   

  1. 1. Department of Chemistry, Fudan University, Shanghai, 200433;
    2. Department of Chemistry, Nanjing University, Nanjing
  • Received:1993-02-13 Revised:1993-08-07 Online:1994-01-24 Published:1994-01-24

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被引次数

1

摘要： 分别用Na2H2EDTA、H4EDTA和HCl对SDY型沸石的非骨架铝进行了浸取处理,并应用化学分析、XRD、高真空苯吸附、低温N2吸附、NH3-TPD和正庚烷裂解脉冲微型反应等物理和化学实验技术对浸取前后样品的结构、酸性和催化性能进行了研究。发现Na2H2EDTA能选择地浸取沉积于沸石微孔和二次孔中的非骨架铝碎片,且不损伤沸石骨架,浸取出部分非骨架铝后的样品,其正庚烷裂解和抗氮性能均有所提高。

关键词: SDY沸石, 浸取, 非骨架铝, 催化裂化

Abstract: The extra-framework aluminum of SDYzeolite has been leached out with Na2H2EDTA,H4EDTA and HCl respectively.The structures,acidities and catalytic properties of these samples have been studied by using chemical analyses,XRD,N2 adsorption,NH3-TPD and n-heptane cracking reaction.It is found that Na2H2EDTA is a selective extractant which removes only amorphous extra-framework aluminum deposited in the zeolite pores without destroying the framework aluminum,Both the n-heptane cracking activity and nitrogen-resistance properties of SDY-NaE are higher than those of SDY.

Key words: SDY zeolite, Leaching, Extra-framework aluminum, Catalytic cracking

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