一锅法合成介孔材料Fe-SBA-15及其对Friedel-Crafts苄基化反应的催化性能

催化学报 , 2008, 29(5): 468-472.

一锅法合成介孔材料Fe-SBA-15及其对Friedel-Crafts苄基化反应的催化性能

刘森 ^1, , 杜耘辰 ^2, , 肖霓 ^3, , 张永来 ^4, , 纪妍妍 ^5, , 肖丰收 ^6,

1.吉林大学化学学院无机合成与制备化学国家重点实验室,吉林长春,130012

2.吉林大学化学学院无机合成与制备化学国家重点实验室,吉林长春,130012

3.吉林大学化学学院无机合成与制备化学国家重点实验室,吉林长春,130012

4.吉林大学化学学院无机合成与制备化学国家重点实验室,吉林长春,130012

5.吉林大学化学学院无机合成与制备化学国家重点实验室,吉林长春,130012

6.吉林大学化学学院无机合成与制备化学国家重点实验室,吉林长春,130012

基金项目: 国家自然科学基金(20573044) 国家重点基础研究发展计划(973计划)(2003CB615802)

关键词：一锅法合成 , 尿素 , 铁 , SBA-15 , 介孔分子筛 , Friedel-Crafts反应 , 苄基氯

One-Pot Synthesis of Mesoporous Fe-SBA-15 and Its Catalytic Performance for Friedel-Crafts Benzylation

采用尿素作为pH值自调节剂,一锅法合成了Fe-SBA-15催化剂. X射线衍射和N2吸附-脱附等温线结果表明, Fe-SBA-15具有与SBA-15相似的介孔结构. 紫外-可见光谱结果表明, Fe-SBA-15样品在550 ℃焙烧后Fe元素主要以四配位形式存在. 活性测试峁砻? Fe-SBA-15对苯及其衍生物的Friedel-Crafts苄基化反应具有优异的催化性能. 例如,在反应温度为70 ℃和苯/苄基氯摩尔比为14.4的条件下,催化剂上苄基氯完全转化所需的时间为20～70 min, 二苯甲烷的选择性为97.8%～100%. 随着反应温度的升高和Fe含量的增加,苄基氯的转化率逐渐升高;随着苯/苄基氯比的减小,苄基氯完全转化所需的时间逐渐延长.

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