催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (7): 585-590.

• 研究论文 • 上一篇    下一篇

氟化物体系中老化方式对合成MCM-22分子筛的影响

吴建梅,王保玉,李牛,项寿鹤   

  1. 南开大学化学学院新催化材料科学研究所, 天津 300071
  • 收稿日期:2006-07-25 出版日期:2006-07-25 发布日期:2006-07-25

Effect of Aging Method on the Synthesis of MCM-22 Zeolite in Fluoride System

WU Jianmei, WANG Baoyu, LI Niu, XIANG Shouhe*   

  1. Institute of New Catalytic Material Science, College of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2006-07-25 Online:2006-07-25 Published:2006-07-25

PDF

864

被引次数

8

摘要： 以氟化钠为矿化剂、六亚甲基亚胺为模板剂,在静态水热条件下考察了静态老化、动态老化及超声老化对合成MCM-22分子筛的影响. 实验结果表明,三种老化方式对合成MCM-22分子筛均有促进作用,其中超声老化的促进作用最明显. 采用超声老化的方法,在氟化物体系中使MCM-22分子筛可合成SiO2/Al2O3摩尔比范围扩大到 20～100, 合成时间缩短到 48～62 h, 同时分子筛的形貌发生了改变.

关键词: MCM-22分子筛, 氟化钠, 超声, 老化, 合成

Abstract: Zeolite MCM-22 was synthesized hydrothermally under static conditions using NaF and hexamethyleneimine as the mineralizing agent and template, respectively. The effects of aging processes (static aging, stirred aging, and ultrasonic aging) on the synthesis of zeolite MCM-22 were investigated. All the above aging treatment methods accelerated the formation of MCM-22, and the ultrasonic aging showed the best effect. The aging treatment with ultrasound noticeably broadened the range of SiO2/Al2O3 molar ratio (the SiO2/Al2O3 molar ratio of the final gel was 20[KG-45x]-[KG-20x]100), shortened the crystallization time to 48～62 h, and changed the morphology of MCM-22 in the fluoride system.

Key words: MCM-22 zeolite, sodium fluoride, ultrasound, aging, synthesis