广西师范大学学报（自然科学版） ›› 2021, Vol. 39 ›› Issue (3): 83-91.doi: 10.16088/j.issn.1001-6600.2020052503

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低硅铝比条件下MCM-56分子筛合成规律研究

郭泽平1, 董盼1, 刘金兰1, 康杰1, 曾敏玉1, 苏凯敏1, 林卿1,2, 何云1*   

  1. 1.广西师范大学 物理科学与技术学院, 广西 桂林 541004;
    2.海南医学院 医学信息学院, 海南 海口 571101
  • 收稿日期:2020-05-25 修回日期:2020-10-28 发布日期:2021-05-13
  • 通讯作者: 何云(1962—),男,广西灌阳人,广西师范大学教授,博士。E-mail: hy@gxnu.edu.cn
  • 基金资助:
    国家自然科学基金(51901052); 广西高校研究生教育创新项目(XJGY2020017); 广西研究生教育创新计划项目(JGY2019034); 大学生创新创业训练计划项目(201910602081); 广西高校中青年教师科研基础能力提升项目(2020KY02022)

Study on the Synthesis of MCM-56 Zeolite with Low SiO2/Al2O3

GUO Zeping1, DONG Pan1, LIU Jinlan1, KANG Jie1, ZENG Minyu1, SU kaimin1, LIN Qin1,2, HE Yun1*   

  1. 1. College of Physical Science and Technology, Guangxi Normal University, Guilin Guangxi 541004, China;
    2. College of Medical Information, Hainan Medical University, Haikou Hainan 571101, China
  • Received:2020-05-25 Revised:2020-10-28 Published:2021-05-13

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摘要： 本文以六亚甲基亚胺(HMI)为模板剂,利用油浴加热和磁力搅拌实现的动态水热晶化合成法,通过改变硅铝物质的量之比(下文简称硅铝比,使用x表示)、晶化温度、晶化时间,研究MCM-56分子筛的合成规律。实验结果表明:硅铝比x=13.33时,因为不满足MCM-56分子筛晶体成核和生长所需的无机结构单元的条件,无法合成MCM-56分子筛;硅铝比x=16.67时,虽然138 ℃晶化5 d、7 d所得样品在晶面100、300、310出现了衍射峰,但结晶度不高,晶化并不完全,反应产物的结构主要为不定型态;当硅铝比x=20.20、晶化温度为138~145 ℃时,均可得到结晶态的MCM-56分子筛,138 ℃晶化7 d所合成样品的比表面积最大,为307.6 m2/g。

关键词: 分子筛, MCM-56分子筛, 低硅铝比, 比表面积

Abstract: The synthesis law of MCM-56 molecular sieve was studied by changing the SiO2/Al2O3,crystallization temperature and crystallization time under the conditions of oil bath heating and magnetic stirring reaction materials with HMI as template. The experimental results show that MCM-56 molecular sieves can not be obtained when the SiO2/Al2O3 is 13.33,the crystallization temperature is 138-145 ℃,and the crystallization time is 5-8 days. When the ratio of SiO2/Al2O3 is 16.67, although diffraction peaks appeare in the crystal faces of 100, 300 and 310 after 5 days and 7 days of crystallization at 138 ℃, the crystallinity is not high and the crystallization is not complete,the main structure of the products is amorphous. When the ratio of SiO2/Al2O3 is 20.20 and the crystallization temperature is 138-145 ℃,the crystallized of MCM-56 molecular sieve can be obtained,and the specific surface area of the synthesized sample is 307.6 m2/g under the condition of crystallization under 138 ℃ for 7 days.

Key words: molecular sieve, MCM-56 molecular sieve, low SiO2/Al2O3, specific surface area

中图分类号: 

  • O469
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