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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
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
