CF-Mg分子筛的微波合成及催化性能研究  

Synthesis of CF-Mg molecular sieve under microwave and its catalytic behaviors

作　　者：张红涛[1] 李翠清[2] 孙桂大[2] 孙艳茹[1] 李凤艳[2] 

机构地区：[1]北京化工大学,北京100029 [2]北京石油化工学院化学工程学院,北京102617

出　　处：《工业催化》2008年第9期30-33,共4页Industrial Catalysis

基　　金：国家重点基础研究发展规划(973计划)项目(2003CB615802)

摘　　要：采用微波水热法合成了含Mg的磷铝结构单元MCM-41分子筛。考察了晶化温度和酸处理等因素对分子筛合成和性能的影响,通过XRD、NH3-TPD、TEM和IR等分析手段对合成的样品进行表征。结果表明,当晶化温度为90℃时,合成的样品具有核壳结构和MCM-41特有的六方排列的孔道结构,酸处理和杂原子的掺入显著提高复合分子筛的酸性。含Mg的磷铝结构单元MCM-41分子筛催化苯与十二烯的烷基化反应时,十二烯的转化率可达到99%以上,2-十二烷基苯的选择性达到20%以上。MCM41 molecular sieves with Mg-containing aluminophosphate building units were synthesized by microwave-assisted hydrothermal method. The as-synthesized samples were characterized by XRD, NH3-TPD, TEM and IR. The effects of crystallization temperature and acid treatment on synthesis and properties of the molecule sieves were investigated. The samples had crust/core and regularly hexagonal pore arrangement when the crystallization temperature was 90℃, and acid amount could be greatly improved by acid treatment and the doping of hetero atoms. Catalytic activity of the MCM-41 molecule sieves containing Mg atoms and aluminophosphate building units was tested for alkylation of benzene and 1-dodecene and 1-dodecene conversion of over 99% and selectivity to 2-dodecylbenzene of over 20% were obtained.

关 键 词：催化化学 磷铝结构单元 MCM-41分子筛 烷基化 微波水热 

分 类 号：O643.36[理学—物理化学] TQ424.25[理学—化学]