以K［Al（OH）_4］铝化硅胶的研究  

Investigation of Alumination of Silica with K[Al(OH)_4]

作　　者：赵志明[1] 李荣生[1] 张武阳[1] 魏洤 

机构地区：[1]吉林进出口商品检验局,吉林大学化学系

出　　处：《东北师大学报（自然科学版）》1995年第4期60-64,共5页Journal of Northeast Normal University(Natural Science Edition)

摘　　要：以Ｋ［Ａｌ（ＯＨ）_４］对硅胶进行铝化。用ＸＰＳ（光电子能谱）、ＩＲ（红外）、ＭＡＳＮＭＲ（魔角核磁共振）以及异戊醇脱水反应表征了铝化硅胶样品。结果表明，硅胶铝化后可以产生Ｂｒｏｎｓｔｅｄ和Ｌｅｗｉｓ酸性。Ｂｒｏｎｓｔｅｄ酸性的产生不排除Ｋ［Ａｌ（ＯＨ）_４］与硅胶表面羟基缩合并在以后的热处理中转化为六配位的铝氧化物，从而显示Ｌｅｗｉｓ酸性。铝化硅胶由于具备了酸性，产生了醇脱水的催化活性。Silica has been aluminated with K[Al(OH)4] in this paper. The aluminated silica samples have been characteristized by x-ray photoelectron spectroscopy (XPS) , infra-red (IR) spectroscopy. magic angle spin nuclear magnetic resonance (MASNMR) as well as dehydration of amyl alcohol. The results show that in the samples of the aluminated silica , acidity is related to the isomorphic replacement of Al for Si. Lewis acidity may be related to six co-ordinated aluminum oxides formed by the thermal conversion of condensation product of [Al (OH)4]- with the surface hydroxyl of silica. The aluminated silica exhibits catalytic activity for the dehydration of alcohol because of its acidity.

关 键 词：铝化硅胶 铝化 硅胶 同晶取代 

分 类 号：TQ424.26[化学工程]