碳酸锂在水和NaCl-KCl溶液体系中溶解度的在线测定  

Online determination of the solubility of lithium carbonate in water and NaCl-KCl solution system

作　　者：王斌 邓小川[1,2] 史一飞 董超超[1,2,3] 樊发英 朱朝梁 樊洁[1,2] Wang Bin;Deng Xiaochuan;Shi Yifei;Dong Chaochao;Fan Faying;Zhu Chaoliang;Fan Jie(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining 810008,China;Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources;University of Chinese Academy of Sciences;Yinchuan Branch of State Power Science&Research Institute Co.,Ltd.)

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]青海省盐湖资源综合利用工程技术中心 [3]中国科学院大学 [4]国家能源集团科学技术研究院有限公司银川分公司

出　　处：《无机盐工业》2021年第7期73-79,共7页Inorganic Chemicals Industry

摘　　要：碳酸锂溶解度在工业结晶生产中是十分重要的基础数据。采用浸入式红外探头和拉曼探头在线监测溶液体系中CO_3~(2-)和碳酸锂的特征峰峰强的变化,依据Lambert-Beer定律得出溶液体系中实时在线测定碳酸锂的溶解度。通过在线测定,测得碳酸锂在氯化钠-氯化钾溶液(cNaCl=0.446 6 mol/L,cKCl=0.015 8 mol/L)中的溶解度高于在水中的溶解度值。实验测试出的水中碳酸锂的溶解度数据还能与Van′t Hoff方程较好地关联,进一步测算碳酸锂在其他温度下水中的溶解度值。此外,该方法测定的碳酸锂在水中的溶解度数据比文献值中采用重量分析法测试出的溶解度数据偏小,是因为测试装置不同造成的。The solubility of lithium carbonate is a very important basic data in industrial crystal production.An immersion infrared probe and a Raman probe were used to test the changes in the characteristic peaks of CO32-and Li2CO3 in the solution system online.Based on Lambert-Beer′s law,the solubility of lithium carbonate was determined online in real time in the solution system.By online monitoring,the solubility of lithium carbonate in the NaCl-KCl solution(cNa Cl=0.4466 mol/L,cKCl=0.0158 mol/L)was measured higher than the solubility value in water.In this experiment,the solubility data in water could be well correlated with the Van′t Hoff equation,which could calculate the solubility of lithium carbonate in water at other temperature.Moreover,the solubility data of lithium carbonate in water determined by this method was smaller than the solubility data measured by gravimetric analysis method in the literature,which was caused by the different test equipment.

关 键 词：碳酸锂 溶解度 在线监测 红外 拉曼 

分 类 号：TQ131.11[化学工程—无机化工]