高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (7): 677.

• 研究论文 •    下一篇

硼-β沸石的合成和酸性

项寿鹤, 王秋英, 王敬中, 王克冰, 李赫咺   

  1. 南开大学化学系
  • 收稿日期:1987-11-24 出版日期:1989-07-24 发布日期:1989-07-24
  • 通讯作者: 项寿鹤
  • 基金资助:

    国家自然科学基金

Synthesis and Acidity of B-β Zeolite

Xiang Shouhe, Wang Qiuying, Wang Jingzhong, Wang Kebing, Li Hexuan   

  1. Department of Chemistry, Nankai University, Tianjin
  • Received:1987-11-24 Online:1989-07-24 Published:1989-07-24

摘要: 研究了在Na2O-B2O3-SiO2-TEAOH-H2O体系中合成B-β沸石的规律,根据晶化动力学曲线测得表观成核活化能和晶化活化能分别为152kJ·mol-1和40kJ·mol-1,用核磁共振、红外光谱、X射线衍射等方法证明了硼进入分子筛骨架,用红外光谱和TPD研究了HB-β沸石的酸性并用正己烷和异丙苯裂解反应考察了其酸催化活性。

关键词: 硼-&beta, 沸石, 合成, 酸性

Abstract: The synthesis of B-β zeolite was studied in the system Na2O-B2O3-SiO2-TEAOH-H2O.The apparent activation energies for nucleation, En, and the activation energy for crystallization, Ec, were calculated on the basis of the crystallization curves.They are 152 kJ·mol-1(ED) and 40 kJ·mol-1 (Ec) respectively.It has been proved that Bis incorporated the framework of Bzeolite during crystallization according to the results obtained from the X-ray diffraction, IRand NMRcharacterization.The acidity of HB-β.was studied by using IRand TPD.B-β has weak acid strength and subsequently has negligible catalytic activity for the n-hexane cracking reaction.However, it exhibits catalytic activity for the cumene cracking reaction.

Key words: B-&beta, Zeolite, Synthesis, Acidity

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