介孔硅铝酸盐材料的合成、 表征及催化应用

J4 ›› 2012, Vol. 50 ›› Issue (06): 1252-1256.

介孔硅铝酸盐材料的合成、表征及催化应用

徐玲¹, 包呼和牧区乐¹, 王晓磊¹, 美春¹, 马媛媛², |刘宗瑞¹

1. 内蒙古民族大学化学化工学院, 内蒙古通辽 028043； 2. 吉林大学化学学院, 长春 130021

收稿日期:2012-05-26 出版日期:2012-11-26 发布日期:2012-11-26
通讯作者: 刘宗瑞 E-mail:liuzr@imun.edu.cn

Synthesis, Characterization and Application ofMesoporous Aluminosilicates Materials

XU Ling¹, BAO Huhemuqule¹, WANG Xiao\|lei¹, MEI Chun¹, MA Yuanyuan², LIU Zongrui¹

1. College of Chemistry and Chemical Engineering, Inner Mongolia University for Nationalities, Tongliao 028043,Inner Mongolia Autonomous Region, China|2. College of Chemistry, Jilin University, Changchun 130021, China

Received:2012-05-26 Online:2012-11-26 Published:2012-11-26
Contact: LIU Zongrui E-mail:liuzr@imun.edu.cn

摘要/Abstract

摘要：

采用NaOH调节体系的pH值, 通过改变造孔剂柠檬酸的加入量, 制备了一系列新型介孔硅铝酸盐材料，并利用X射线衍射(XRD)、透射电镜(TEM)和N₂吸附脱附等进行表征，同时分析了不同柠檬酸加入量对材料孔结构的影响. 结果表明：合成材料具有蠕虫状内交联的介孔结构，具有较强的酸性；柠檬酸与铝物质的量比为13的样品在苯酚与叔丁醇烷基化反应中具有较高的催化活性和对2,4-二叔丁基苯酚（2,4-DTBP）的选择性；较高的苯酚转化率和对2,4-DTBP的选择性主要归因于催化剂较强的酸性和较大的介孔孔径.

关键词: 介孔硅铝酸盐；柠檬酸；烷基化反应；苯酚叔丁基化

Abstract:

A series of mesoporous aluminosilicate catalysts was synthesized from the synthesizing system with different amounts of citric acid (CA) as poreforming agent and NaOH as pH adjusting agent. XRD, TEM and N2 adsorption characterization results confirm the presence of interconnected wormlike meso
porous structure in the mesoporous aluminosilicate catalysts. The effect of different amount CA on the porous structures of the mesoporous aluminosilicate materials was investigated. NH₃TPD characterization suggests that most of Al was introduced into mesoporous framework and imparted acid sites. Catalytic test shows that the mesoporous aluminosilicate catalyst with n(CA)∶n(Al)=13 exhibits higher catalytic activity than the other catalyst for the alkylation of phenol with tert\|butanol. The excellent catalytic activity and high 2,4-diTBP selectivity are mainly assigned to the acidity together with the large pore size of the mesoporous aluminosilicate catalyst.

Key words: mesoporous aluminosilicate, citric acid (CA), alkylation, phenol tertbutyl alcohol

中图分类号:

O611

徐玲, 包呼和牧区乐, 王晓磊, 美春, 马媛媛, 刘宗瑞. 介孔硅铝酸盐材料的合成、表征及催化应用[J]. J4, 2012, 50(06): 1252-1256.

XU Ling, BAO He-He-Mu-Gou-Le, WANG Xiao-Lei, MEI Chun, MA Yuan-Yuan, LIU Zong-Rui. Synthesis, Characterization and Application ofMesoporous Aluminosilicates Materials[J]. J4, 2012, 50(06): 1252-1256.

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