镓皂石的合成和交联及其催化性能  

SYNTHESIS OF GALLIUM-SUBSTITUTED SAPONITE (GaS) AND CATALYTIC PROPERTY OF PILLARED GaS

作　　者：周群[1] 王彩霞[1] 黄东律 蒋大振[1] 闵恩泽[1] 

机构地区：[1]吉林大学化学系,长春130023

出　　处：《Chinese Journal of Catalysis》1993年第6期478-483,共6页催化学报（英文）

基　　金：国家自然科学基金

摘　　要：用水热法合成了Ｇａ取代皂石（ＧａＳ，并用羟基铝低聚物与其交换制得了ＰＧａＳ。用ＸＲＤ，＾２７Ａｌ、＾２９Ｓｉ ＭＡＳ ＮＭＲ和ＮＨ３－ＴＰＤ表征了ＧａＳ，ＰＧａＳ和ＣＰＧａＳ。在１，２，４－三甲苯歧化反应中观察了ＰＳ（交联皂石）和ＰＧａＳ的催化性能。结果表明ＧａＳ的结晶度很高，Ｇａ确实进入了皂石的骨架，与ＰＳ相比，ＰＧａＳ的活性和活性衰减低，歧化选择性高。Gallium-substituted saponite (GaS) was synthesized by hydrothermal method. The pillared GaS (PGaS) was prepared by intercalating the GaS with aluminium hydroxy polymer [Al13O4 (OH)24(H2O)12]7+,GaS, PGaS and CPGaS were characterized with XRD,27A1 and 29S.i MAS NMR and NH3-TPD. The catalytic properties of PS (pillared saponite) and PGaS for the disproportionation of 1,2,4-trimethylbenzene were determined. The results showed that the GaS had a good crystallinity and Ga entered indeed into the framework of saponite. As compared with PS, the activity and activity decay of PGaS are lower,the selectivity for disproportionation is higher. This may be caused by more Lewis acid sites on the surface of PGaS.

关 键 词：交联 三甲苯 歧化 催化性能 镓皂石 

分 类 号：O614.371[理学—无机化学]