氧化铬-铝混杂柱支撑蒙脱石的制备和性能  

PREPARATION AND CHARACTERIZATION OF CHROMALUMINA PILLARED MONTMORILLONITES

作　　者：田淑贵[1] 王冠鑫[1] 林传易[1] 陈国玺[1] 

机构地区：[1]中国科学院广州地球化学研究所,广州510640

出　　处：《矿物学报》2000年第2期108-111,共4页Acta Mineralogica Sinica

基　　金：国家自然科学基金资助项目!(批准号:49172081)

摘　　要：以浙江和新疆的膨润土为原料合成了氧化铬 -铝混杂柱支撑蒙脱石。分别用铝盐及铬盐溶液 ,经碱水解生成相应的聚羟基铬 -铝混杂阳离子的成柱溶液 ,聚羟基铬 -铝混杂阳离子通过阳离子交换引入蒙脱石 ,所得产物的性质用X射线衍射、热分析、红外光谱和BET比表面及孔径分布测量等方法研究并与氧化铬柱支撑蒙脱石 (简称铬蒙脱石 )的性能进行比较 ,所得氧化铬 -铝混杂柱支撑蒙脱石 (简称铬 -铝蒙脱石 ) ,其基面间距较高 (2 .1nm) ,稳定性也较好 ,BET氮比表面积为 2 16m2 /g 。Chromialumina pillared montmorillonite was prepared using bentonites from Zhejiang Province and Xinjiang Uygar Autonomous Region as starting materials. Pillaring agent solutions were prepared by hydrolyzing chromium and aluminum salt solutions using Na\-2CO\-3 and NaOH as the source of base respectively. The polyoxochromalumina cations were introduced into montmorillonite through a cation\|exchange process and the products obtained were characterized by XRD, thermal analysis, infrared spectroscopy and BET specific surface measurements. The chromialumina pillared montmorillonite obtained has a basal spacing of 2.1 nm and a BET N\-2 specific surface of 216 m\+2/g.

关 键 词：氧化铬-铝混杂柱支撑蒙脱石 XRD IR BET 比表面 

分 类 号：P578.94[天文地球—矿物学]