高镁锂比盐湖卤水降镁研究  

Study on Reducing Magnesium in Salt Lake Brine with High Magnesium-lithium Ratio

作　　者：辛娟 李海朝[1] 张丽娟[1] 祝永强[1] XIN Juan;LI Hai-chao;ZHANG Li-juan;ZHU Yong-qiang(Key Laboratory of Applied Chemistry of Qinghai Provnce,Qinghai Nationalities University.,Xining 810007,China)

机构地区：[1]青海民族大学,青海省应用物理化学重点实验室,青海西宁810007

出　　处：《盐科学与化工》2022年第2期18-20,共3页Journal of Salt Science and Chemical Industry

摘　　要：以六水氯化镁为镁源,碳酸钠为沉淀剂,室温下通过沉淀法来降低高镁锂比盐湖卤水中镁含量。考察了不同碳酸钠加入量的降镁效果以及在降镁过程中是否会对锂离子产生影响。采用电感耦合等离子体质谱仪(ICP-MS)、X射线衍射仪(XRD)对所得到产物的物相、组成以及母液中镁离子含量进行了分析。结果表明该固体产物主为三水碳酸镁,且在以摩尔比为1∶1.0为界,当小于1∶1.0,所得产物中存在锂离子,而大于等于1∶1.0时,产物中不存在锂离子。这一实验结论对实现镁的降低和锂资源的利用具有潜在意义。Using magnesium chloride hexahydrate as the magnesium source and sodium carbonate as the precipitant,the magnesium content in the salt lake brine with high magnesium-lithium ratio can be reduced by the precipitation method at room temperature.The magnesium reduction effect of different sodium carbonate addition amount and whether it will affect the lithium ion during the magnesium reduction process was investigated.Inductively coupled plasma mass spectrometer(ICP-MS)and X-ray diffractometer(XRD)were used to analyze the phase and composition of the obtained product and the content of magnesium ions in the mother liquor.The results showed that the solid product is mainly magnesium carbonate trihydrate,and when the molar ratio is 1:1.0 as the boundary,when the molar ratio is less than 1:1.0,there is lithium ion in the resulting product,and when it is greater than or equal to 1:1.0,there is no lithium ion in the product;this experimental conclusion has potential significance for the reduction of magnesium and the utilization of lithium resources.

关 键 词：高镁锂比 碳酸钠 降镁 锂离子 

分 类 号：TQ132.2[化学工程—无机化工]