催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (7): 803-808.

• 研究论文 • 上一篇    下一篇

以四乙基氢氧化铵-四甲基氯化铵为模板剂水热法合成 UZM-5 沸石

刘艳, 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:2010-07-25 出版日期:2010-07-25 发布日期:2010-07-25

Synthesis of UZM-5 Zeolite by a Hydrothermal Method Using Tetraethylammonium Hydroxide-Tetramethylammonium Chloride as Organic Templates

LIU Yan, LI Yingxia*, LI Jianwei, CHEN Biaohua   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2010-07-25 Online:2010-07-25 Published:2010-07-25

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1072

被引次数

10

摘要： 以四乙基氢氧化铵 (TEAOH)-四甲基氯化铵 (TMACl) 为复合模板剂, 采用静态水热法合成了 UZM-5 沸石. 较为系统地考察了合成条件对 UZM-5 沸石的生长和晶化的影响, 并采用 X 射线衍射、红外光谱和热重等手段对样品进行了表征. 结果表明, 在 SiO2:(0.16~0.5)Al2O3:(0.4~1.0)TEAOH:(0.06~0.13)TMACl:20H2O 的初始反应物摩尔比条件下, 均能获得结晶良好的 UZM-5 沸石. 适宜的晶化温度为 403~423 K, 过高的晶化温度将导致无定形产物的生成. 当以硅溶胶为硅源时, 晶化只需 2 d, 而以硅酸或硅胶为硅源时则分别需要 4 d 和 5 d, 过长的晶化时间导致杂晶方钠石的生成. Na+ 的存在容易导致 UZM-9 沸石的生成, 影响产物的相选择性.

关键词: UZM-5 沸石, UZM-9 沸石, 四乙基氢氧化铵, 四甲基氯化铵, 水热法, 硅源, 钠离子

Abstract: The synthesis of UZM-5 zeolite by the hydrothermal method in the tetraethylammonium hydroxide (TEAOH)-tetramethylammonium chloride (TMACl) two-organic component system was studied. The products were characterized using X-ray diffraction, infrared spec-troscopy, and thermogravimetry. The crystallization process and growth of UZM-5 zeolite were investigated. The results indicated that the UZM-5 zeolite could be synthesized when the initial mixture was SiO2:(0.16–0.5)Al2O3:(0.4–1.0)TEAOH:(0.06–0.13)TMACl:20H2O. Too high temperature was disadvantageous to the crystallization process. UZM-5 zeolite could be synthesized in the temperature range of 403–423 K. Too long time led to the crystallization of sodalite zeolite. The synthesis of UZM-5 zeolite with silica sol needs 2 days, while silicic acid 4 days and silica gel 5 days. A small amount of Na+ ions resulted in the crystallization of UZM-9 zeolite and had an effect on the phase selectivity.

Key words: UZM-5 zeolite, UZM-9 zeolite, tetraethylammonium hydroxide, tetramethylammonium chloride, hydrothermal method, silica source, sodium ion