催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (8): 1071-1076.DOI: 10.3724/SP.J.1088.2010.00510

• 研究论文 • 上一篇    下一篇

混合胺体系中 MCM-49/ZSM-35 复合分子筛的晶化过程

谢素娟 1, 刘克峰 1,2, 刘盛林 1, 刘勇 1, 张维萍 3, 徐龙伢 1,3   

  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 3中国科学院大连化学物理研究所催化基础国家重点实验室, 辽宁大连 116023
  • 收稿日期:2010-05-07 出版日期:2010-08-30 发布日期:2013-12-26
  • 通讯作者: 徐龙伢

The Crystallization Process of MCM-49/ZSM-35 Composite Zeolites in a Mixed-Amine System

XIE Sujuan1, LIU Kefeng1, 2, LIU Shenglin1, LIU Yong1, ZHANG Weiping1, 3, XU Longya1, 3, *   

  1. 1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2010-05-07 Online:2010-08-30 Published:2013-12-26

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856

被引次数

9

摘要： 采用 X 射线衍射、N2 吸附-脱附、扫描电镜和傅里叶变换红外光谱等技术, 研究了 MCM-49/ZSM-35 复合分子筛在 Na2O-SiO2-Al2O3-CHA (环己胺)-HMI (六亚甲基亚胺)-H2O 合成体系中, 先在低温 80 ?C 老化 4 h, 再经 160 ?C 晶化不同时间的演变过程. 结果表明, 在该混合胺体系中, 首先生成 MCM-49 分子筛, 随着晶化时间的延长, 形成 ZSM-35 含量逐渐增加的 MCM-49/ZSM-35 复合分子筛, 最后生成纯 ZSM-35 分子筛; ZSM-35 的生成是以 MCM-49 分子筛的消耗为代价的.

关键词: MCM-49, ZSM-35, 复合分子筛, 合成, 晶化过程, 环己胺, 六亚甲基亚胺

Abstract: The crystallization process of MCM-49/ZSM-35 composite zeolites in the Na2O-SiO2-Al2O3-CHA (cyclohexamine)-HMI (hexa-methyleneimine)-H2O system was investigated by X-ray diffraction, N2 adsorption, scanning electron microscopy, and Fourier transform infrared spectroscopy. The results showed that in the HMI-CHA system, pure phase MCM-49 was obtained first, then MCM-49/ZSM-35 composite zeolites were gradually formed with increasing ZSM-35 content upon the crystallization time, and finally pure phase ZSM-35 was produced. Moreover, the formation of ZSM-35 zeolite was based on the consumption of MCM-49 zeolite in this mixed-amine system.

Key words: MCM-49, ZSM-35, composite zeolite, synthesis, crystallization process, cyclohexamine, hexamethyleneimine