催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (12): 1237-1241.

• 研究论文 • 上一篇    下一篇

化学液相沉积法改性HY沸石及其对萘与叔丁醇择形烷基化反应的催化性能

王莹利1,2,许磊1,于政锡1,2,张新志1,刘中民1   

  1. 1 中国科学院大连化学物理研究所, 辽宁大连 116023; 2 中国科学院研究生院, 北京 100049
  • 收稿日期:2008-12-25 出版日期:2008-12-25 发布日期:2012-09-20

HY Zeolite Modified by Liquid Silane Deposition and Its Catalytic Activity in Selective tert-Butylation of Naphthalene

WANG Yingli1,2, XU Lei1, YU Zhengxi1,2, ZHANG Xinzhi1, LIU Zhongmin1*   

  1. 1 Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2008-12-25 Online:2008-12-25 Published:2012-09-20

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摘要： 采用化学液相沉积法,经异丁基三乙氧基硅烷修饰并用高温水蒸气处理得到了改性HY沸石. 采用X射线衍射、低温N2吸附和脉冲式质量分析技术研究了改性样品骨架结构、比表面积、孔结构参数和吸附性质的变化,并考察了HY沸石及其改性后样品对萘与叔丁醇烷基化制备2,6-二叔丁基萘(2,6-DTBN)反应的催化性能. 结果表明,改性后HY沸石的骨架结构基本不变,但比表面积增大,平均孔径缩小,孔口尺寸得到了一定调变. 在改性后HY沸石催化剂上萘与叔丁醇烷基化反应活性下降,但催化剂择形性能明显提高,其2,6-DTBN/2,7-DTBN比可以达到6.62.

关键词: 化学液相沉积, HY沸石, 萘, 叔丁醇, 2, 6-二叔丁基萘

Abstract: HY zeolite was modified by chemical liquid deposition with i-C4H9Si (OC2H5)3 and a hydrothermal treatment. Due to the modification of microp ore structure and the narrowing of pore opening in the modified samples, t he differenc e in adsorption rate between various adsorbants with different kinetic diam e ters was more pronounced. The suppression was stronger on larger molecules.

Key words: chemical liquid deposition, HY zeolite, naphthalene, tert-butyl alcohol, 2, 6-di-tert-butylnaphthalene