以微孔沸石MCM-49和MCM-56为硅铝源合成强酸性介孔分子筛  

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

作　　者：宋科[1] 管景奇[1] 吴淑杰[1] 徐海燕[1] 阚秋斌[1] 

机构地区：[1]吉林大学化学学院,长春130021

出　　处：《高等学校化学学报》2009年第2期344-348,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20673046)资助

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.With zeolites MCM-56 and MCM-49 as the sources of silicon and aluminum treated with a sodium hydroxide solution, cetyhrimethylammonium 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.

关 键 词：MCM-49 MCM-56 介孔分子筛 强酸性 叔丁基化 

分 类 号：O643.322[理学—物理化学]