用于除硅的铝盐改性膨润土的制备与表征  

The preparation and characterization of aluminum salt modified bentonite in desilication

作　　者：林涛[1] 李雪[1] 徐永建[1,2,3] 张鼎军 朱振峰[2] 

机构地区：[1]陕西科技大学轻工与能源学院陕西省造纸技术及特种纸品开发重点实验室,陕西西安710021 [2]陕西科技大学材料科学与工程博士后流动站,陕西西安710021 [3]贵州赤天化集团有限责任公司,贵州赤水564700

出　　处：《岩石矿物学杂志》2014年第3期567-573,共7页Acta Petrologica et Mineralogica

基　　金：国家十二五科技支撑计划项目课题(2012BAD23B0201);国家自然科学基金(20876092);陕西科技大学学科带头人培育计划项目(20876092)

摘　　要：改变了传统制备铝盐改性膨润土工艺中原料的添加顺序,增强了膨润土的膨胀性能。对制备的铝盐改性膨润土进行SEM、XRD、粒径分布以及红外光谱表征,并与原料-钠基膨润土进行了对比,得到了改性的机理。最后,利用钠基膨润土和铝盐改性膨润土吸附硅酸盐的现象以及性能对铝盐改性膨润土进行了评估。结果表明:铝盐改性膨润土的制备方法较为简单,省去了传统工艺中加碱调节pH值,采用先将水浴钠基膨润土混合,再加改性剂的添加顺序,得到的铝盐改性的膨润土有很好的除硅效果,最高可达99%。In this paper,the order of addition in the preparation of aluminum salt modified bentonite process is changed as compared with the traditional method.The expansion performance in aluminum salt modified bentonite is enhanced,and the modified bentonite is characterized by SEM,XRD,particle size distribution and FTIR and compared with the raw material Na-bentonite to deduce the mechanism of modification.Finally,the appearance is observed and the performance of adsorption is investigated.It is shown that,compared with the traditional method,the preparation of aluminum salt modified bentonite is relatively simple,and the addition order is different from that in the traditional method in that the bentonite is first mixed in water and then the modified agent is added.The modified bentonite has an efficient effect on silicate removal which can reach up to 99%.

关 键 词：改性膨润土 制备 表征 吸附 

分 类 号：P619.255[天文地球—矿床学] P579[天文地球—地质学]