高比表面纳米碱式碳酸铈的工业化生产工艺研究  

Research on Industrial Production Process of High Specific Surface Area Nano Basic Cerium Carbonate

作　　者：刘建刚 钟杨根 周武风 游其峰 Liu Jiangang;Zhong Yanggen;Zhou Wufeng;You Qifeng(Jiangxi Goden Century Advanced Materials Co., Ltd., Jiangxi Rare Earth Materials Engineering Technology Research Center, Nanchang 330013,China)

机构地区：[1]江西金世纪新材料股份有限公司江西省稀土材料工程技术研究中心

出　　处：《广东化工》2019年第19期80-82,共3页Guangdong Chemical Industry

摘　　要：以碳酸氢钠为沉淀剂,辅助加碱转型法成功制备出高比表面纳米碱式碳酸铈。利用激光粒度仪、比表面测定仪、扫描电镜、X射线衍射仪、ICP-AES分析仪及EDTA滴定方法研究了不同反应条件对碱式碳酸铈产品粒度、比表面、形貌、产品类型、杂质含量及总量的影响。实验结果表明:控制一定的料液起始浓度,先常温沉淀,再升高至一定温度,然后缓慢滴加碱溶液,保持一定的pH值转型一段时间,所得产品为碱式碳酸铈:D50<100nm、比表面>100m^2/g、且产品过滤性能良好、振实密度高、Cl-含量低,非常适合工业化生产。High specific area nano Basic Cerium Carbonate was successfully synthesized using sodium bicarbonate as the precipitant followed with a process of Alkali addition transformation .The influences of different reaction conditions on the particle size ,specific surface area ,appearance, product category, impurities contents and TREO of the products were studied by using laser particle analyzer, specific surface tester, scanning electron microscope, X-ray diffractometer, ICP-AES analyzer and titrimetric method. The experimental results show that Basic Cerium Carbonate can be prepared by precipitating firstly under ordinary temperature with a certain initial Cerium ion concentration and then transform under higher temperature and PH for a certain time. The analysis results indicate that the as prepared product exhibits better filtering quality , lower non-rare earth impurity content , its median particle size is less than 100nm and its specific surface area is higher than 100m^2/g.

关 键 词：碳酸氢钠 加碱转型 高比表面 纳米碱式碳酸铈 

分 类 号：TQ[化学工程]