催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (3): 191-195.

• 研究论文 • 上一篇    下一篇

以四乙基溴化铵为模板剂气相传输法合成B沸石

牛田瑛, 李英霞, 李建伟, 陈标华   

  1. 北京化工大学化工资源有效利用国家重点实验室, 北京100029
  • 收稿日期:2009-03-25 出版日期:2009-03-25 发布日期:2012-12-19

Synthesis of Zeolite Beta by the Vapour-Phase Transport Method Using Tetraethylammonium Bromide as the Organic Template

NIU Tianying, LI Yingxia*, LI Jianwei, CHEN Biaohua   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2009-03-25 Online:2009-03-25 Published:2012-12-19

PDF

1220

摘要： 以廉价的四乙基溴化铵为模板剂, 采用原料直接混合气相传输法合成?沸石. 利用X射线衍射、红外光谱和扫描电镜等手段对产物进行了表征, 考察了合成条件对?沸石晶化的影响. 结果表明, 在硅铝比为15~200, 钠硅比为0.35~0.55, 模硅比大于0.12时都可以得到结晶度良好的?沸石. 该方法合成?沸石需要较高的碱硅比, 投料硅铝比范围宽, 晶体生长速度快, 423 K时10 h生长期已基本结束. 过高的晶化温度和过长的晶化时间均易导致杂晶生成. 合成的?沸石形貌随晶化时间变化, 由晶化初期的椭球形转变为晶化结束时的不规则多面体.

关键词: B沸石, 四乙基溴化铵, 气相传输法, 合成相区, 模板剂

Abstract: The synthesis of zeolite beta by the vapour-phase transport method using tetraethylammonium bromide (TEABr) as a cheap organic template was studied. With TEABr being solid state at room temperature, the materials were mixed directly, and the preparing xerogel was not necessary. This method is promising and economical, which simplifies the synthetic process and reduces the cost.

Key words: zeolite beta, tetraethylammonium bromide, vapour-phase transport method, ternary compositional diagram, template