高等学校化学学报

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以微孔沸石MCM-49和MCM-56为硅铝源合成强酸性介孔分子筛

宋科, 管景奇, 吴淑杰, 徐海燕, 阚秋斌   

  1. 吉林大学化学学院, 长春 130021
  • 收稿日期:2008-05-12 修回日期:1900-01-01 出版日期:2009-02-10 发布日期:2009-02-10
  • 通讯作者: 阚秋斌

Synthesis of Mesoporous Aluminosilicates with Enhanced Acidity from Zeolites MCM-56 and MCM-49

SONG Ke, GUAN Jing-Qi, WU Shu-Jie, XU Hai-Yan, KAN Qiu-Bin*   

  1. College of Chemistry, Jilin University, Changchun 130021, China
  • Received:2008-05-12 Revised:1900-01-01 Online:2009-02-10 Published:2009-02-10
  • Contact: KAN Qiu-Bin

摘要: 以相同硅铝比的微孔沸石MCM-49 和MCM-56为硅铝源, 通过碱处理和十六烷基三甲基溴化铵模板剂, 合成了具有较强酸性的六方结构介孔分子筛材料MM-49和MM-56, 并采用XRD、红外光谱、氮气吸附-脱附等方法对其进行了结构表征, 采用NH3-TPD和IR-吡啶吸附方法对其进行了酸性表征. 实验结果表明, MM-56和MM-49具有明显强于常规介孔分子筛酸性的特点, 在苯酚与叔丁醇的烷基化反应中表现了良好的催化性质.

关键词: MCM-49, MCM-56, 介孔分子筛, 强酸性, 叔丁基化

Abstract: With zeolites MCM-56 and MCM-49 as the sources of silicon and aluminum treated with a sodium hydroxide solution, cetyltrimethylammonium bromide(CTAB) as template, mesoporous aluminosilicates with hexagonal structure denoted as MM-56 and MM-49 were synthesized. The structures of MM-56 and MM-49 were characterized via XRD, FTIR and N2 adsorption-desorption techniques. The acidities of MM-56 and MM-49 were characterized via NH3-TPD and IR spectroscopy of pyridine adsorption. Compared with conventional mesoporous aluminosilicates materials, MM-56 and MM-49 have enhanced acidity and show higher catalytic activity for the alkylation of phenol with tert-butanol.

Key words: MCM-56, MCM-49, Mesoporous, Enhanced acidity, Alkylation with tert-butanol

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