高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (12): 2226.

• 研究论文 • 上一篇    下一篇

导向剂法合成低硅X型沸石(LSX)

崔邑诚, 韩东成, 傅乐峰, 张爱民, 须沁华, 董家騄   

  1. 南京大学化学系, 南京210093
  • 收稿日期:2002-03-06 出版日期:2002-12-24 发布日期:2002-12-24
  • 通讯作者: 董家騄(1938年出生),男,副教授,从事分子筛的合成及其催化性能研究.E-mail:djl98012@jlonline.com E-mail:djl98012@jlonline.com
  • 基金资助:

    国家教育部(教技司78)资助

Synthesis of Low-silica X-Zeolite via Crystallization Directing Agent Method

CUI Yi-Cheng, HAN Dong-Cheng, FU Le-Feng, ZHANG Ai-Min, XU Qin-Hua, DONG Jia-Lu   

  1. Department of Chemistry, Nanjing University, Nanjing 210093, China
  • Received:2002-03-06 Online:2002-12-24 Published:2002-12-24

摘要: 利用导向剂法(CDA)合成低硅[n(SiO2)/n(Al2O3)≈2.0]X型沸石,用XRD,X射线荧光光谱测定样品的晶相及化学组成,并利用电子衍射对导向剂在老化过程中的结构变化进行了研究.结果表明,导向剂法合成速度快、杂晶极少.在晶化过程中的导向作用是一个持续过程,其活性不仅与配方、老化时间和温度有关,而且与其晶面的生长有关.

关键词: 导向剂(CDA), 低硅X型沸石(LSX), 老化, 晶化

Abstract: Low-silica X-zeolite(LSX) with a molar ratio 2.0 of SiO2to Al2O3has been prepared by crystallization directing agent(CDA). The crystal structure was studied by XRD. The composition and crystal phases were detected by X-ray fluorescence spectrum and electron diffraction spectrum. LSX was synthesized quickly with a high crystallization by using the CDA method. The directing effect of CDA was consecutive in the synthesis. The effect of CDA is related to the composition of mixture, aging time and temperature, and it is related to the growth of the crystal faces.

Key words: Crystallization directing agent(CDA), Low-silica X-zeolite(LSX), Aging, Crystallization

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