硫酸镁复合精制-氟化制备高纯氟化镁实验研究  

Preparation of high purity magnesium fluoride by magnesium sulfate composite refining and fluorination

作　　者：赵玉祥 黄培锦[1] 马振营 李筱 李波[1,2] 邹兴武 王树轩[1,2] Zhao Yuxiang;Huang Peijin;Ma Zhenying;Li Xiao;Li Bo;Zou Xingwu;Wang Shuxuan(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese A cademy of Sciences,Xining,810008,China;Qinghai Engineering and Technology Research Center of Salt Lake Resources Development;University of Chinese Academy of Sciences;Tesling Center of Qinghai Nuclear Industry Geological Bureau)

机构地区：[1]中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁810008 [2]青海省盐湖资源开发工程技术研究中心 [3]中国科学院大学 [4]青海省核工业检测试验中心

出　　处：《无机盐工业》2019年第12期23-25,共3页Inorganic Chemicals Industry

基　　金：青海省科技厅(2017-GX-102)

摘　　要：杂质离子的存在会影响氟化镁在后续制备的氟化物玻璃、热压晶体等的应用,需要采取措施降低氟化镁中的杂质离子含量。同时为进一步降低原料成本,实验选用工业级硫酸镁为原料,通过对其进行复合精制、碳酸化、氟化获得了杂质离子含量符合要求的高纯氟化镁。硫酸镁的精制过程采用氧化还原与化学沉淀相结合的方式,用碳酸氢铵将精制的硫酸镁溶液碳酸化为碳酸镁,最后与电子级氢氟酸混合氟化得到高纯氟化镁。实验结果表明,采用此方法制得的氟化镁中铁、锰等杂质离子的质量分数均低于5×10^-6,符合高纯氟化镁对杂质离子含量的要求。说明按照此方法制备高纯氟化镁是切实可行的。The presence of impurity ions affects the application of magnesium fluoride in subsequent fluoride glass,hot-pressed crystals and other aspects,and measures should be taken to reduce the impurity ion content.At the same time,in order to further reduce the cost of raw materials,the industrial grade magnesium sulfate was selected as raw material in the experiment,and high-purity magnesium fluoride which meets the requirements by composite refining,carbonation and fluorination was obtained.The refining process used a combination of redox and chemical precipitation,and the refined solution was carbonated to magnesium carbonate with ammonium hydrogencarbonate,then was mixed with electronic grade hydrofluoric acid to obtain high-purity magnesium fluoride.The results showed that the mass fraction of impurity ions such as Fe and Mn in the magnesium fluoride prepared by this process was lower than 5×10^-6,which meets the requirement of impurity ion content of magnesium fluoride.It is indicated that it is feasible to prepare high-purity magnesium fluoride according to this method.

关 键 词：硫酸镁 复合精制 高纯氟化镁 

分 类 号：TQ132.2[化学工程—无机化工]