铝-稀土柱撑膨润土的制备与表征  

Preparation and Characterization of Clays Pillared by Poly Hydroxyl-Al-Rare Earth Cations

作　　者：张文娟[1,2,3] 王其伟[1,2] 丁艳蓉[1,2] 宋静[1,2] 张立锋 ZHANG Wen-juan;WANG Qi-wei;DING Yan-rong;SONG Jing;ZHANG Li-feng(State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou 014030,China;National Engineering Research Centre of Rare Earth Metallurgy and Function Materials,Baotou 014030,China;School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]包头稀土研究院白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头014030 [2]稀土冶金及功能材料国家工程研究中心,内蒙古包头014030 [3]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《稀土》2020年第6期55-63,共9页Chinese Rare Earths

基　　金：内蒙古自治区自然科学基金项目(2016MS0528)。

摘　　要：以内蒙古某地的钙基膨润土为原料,对其进行特性分析、钠化改型,再以改型膨润土为基质,采用常规水相合成法制备了蒙脱石层间铝-稀土柱撑膨润土(Al-Rare earth/Pillared Interlayered Clay)。借助X射线衍射分析(XRD),氮气吸附及扫描电镜(SEM)等分析手段,考察了碱化度、柱撑剂反应时间、柱撑反应温度和稀土元素种类对柱撑膨润土在层间距(d001)、比表面积(BET)等性能方面的影响行为。结果表明,当碱化度为2.5(以Al计),柱撑剂反应时间2 h,柱撑反应温度60℃,稀土元素Ce为复合柱撑剂时,500℃煅烧后铝-稀土柱撑膨润土的d001层间距稳定在1.845 nm,比表面积达299.9 m2·g^-1,具有较好的热稳定性。Na-montmorillonite from Inner Mongolia was used to synthesize Al-RE pillared clay in water system after property analysis and modification with sodium compounds. X-ray diffraction analysis(XRD), nitrogen adsorption and scanning electron microscopy(SEM) were used to analyze the influences of basicity, the reaction time of the pillaring agent, the reaction temperature of the pillars and the type of rare earth elements on the interlayer spacing(d001) and specific surface area(BET) of pillared bentonite. The results show when basicity is 2.5(in terms of Al), the reaction time of the pillaring agent is 2 h, the reaction temperature of the pillaring is 60 ℃, and the rare earth element Ce is used as the pillaring agent, the interlayer spacing(d001) and the specific surface area of Al-RE pillared bentonite is stable at 1.845 nm and 299.9 m2·g^-1 after calcination at 500 ℃.

关 键 词：钠化改型 稀土 铝-稀土柱撑膨润土 层间距 比表面积 

分 类 号：P579[天文地球—矿物学] O614.33[天文地球—地质学]