高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (6): 741.

• 研究论文 •    下一篇

USY型分子筛与高岭土的水热热压固化及固化体性能研究

孟宪平, 嵇天浩, 庞文琴   

  1. 吉林大学化学系, 长春 130023
  • 收稿日期:1992-10-05 修回日期:1993-02-15 出版日期:1993-06-24 发布日期:1993-06-24
  • 通讯作者: 孟宪平.
  • 基金资助:

    国家自然科学青年基金;吉林省科委应用基础研究基金

Studies on the Solidification and Characterizations of USY Type Molecular Sieve-Kaolin by Hydrothermal Hot-Pressing Technique

MENG Xian-Ping, JI Tian-Hao, PANG Wen-Qin   

  1. Departmeat of Chemistry, Mm University, Changchun, 130023
  • Received:1992-10-05 Revised:1993-02-15 Online:1993-06-24 Published:1993-06-24

摘要: 应用水热热压技术制备了各种USY型分子筛-高岭土的固化成型体,并对其进行物相分析、表面酸性以及对正十五烷裂解的催化性能测定。实验结果表明:USY型分子筛与高岭土的固化体具有较强的B酸中心,而几乎没有L酸中心。135℃下得到的固化体对n-十五烷的裂解活性及汽油转化率都高于未经处理的样品。水热热压固化温度是影响固化体性能的重要条件,可以利用固化体组分的改变及固化条件的控制来调节固化体表面酸性及其催化性能。

关键词: USY型分子筛, 高岭土, 表面酸性, 水热热压固化, 正十五烷裂解

Abstract: Aseries of solidified bodies of kaolin, mixed with USYtype molecular sievs, were prepared by using the hydrothermai hot-pressing technique, The phase transformation, surface acidity, and catalytic cracking reaction of R- pentadecane were investigated.The results show that the temperature of solidification is one of the important factors which influence the properties of the solidified bodies under the condition of hydrothermai hot-pressing and that the solidified bodies of USY-kaolin have majority of Bronsted acid sites and few Lewis acid sites.The activity and gasolin conversion of the solidified bodies at 135℃ for n-pentadecane cracking are higher than those of the untreated sample.The surface acidity and catalytic characters of solidified bodies can be adjusted by means of changing compositions of the initial mixture and the conditions of solidification.

Key words: USY type molecular sieve, Kaolin, Surface acidity, Hydrothermal hot-pressing solidification, s-pentadecane cracking

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