摘要
基于碱金属氯化物在乙醇中的溶解度差异，首次提出了乙醇萃取法制备低Na，K高纯氯化锂的工艺方法．除Ca实验表明，当草酸锂的加入量为0．6％时，Ca质量分数可控制在10×10^-6～15×10^-6以下；除Na，K实验表明，当液固比为8．5，过滤次数为2次时，Na质量分数可降到40×10^-6以下，K质量分数可降到5×10^-6以下．说明乙醇萃取法很好地解决了氯化锂制备中很难深度除去Na，K的技术难题．
Based on the different of solubilities of alkali metal chlorides in alcohol, the highly purified lithium chloride with low sodium/potassium contents was prepared for the first time by alcohol extraction process, The results showed that calcium content in mass fraction can be controlled lower than （10- 15）×10^-6 after decalcification by adding 0.6 % lithium oxalate, meanwhile, the sodium and potassium contents can be lower than 40 ×10^-6 and 5×10^-6, respectively, when filtering the .solution 2 times and the liquid to solid ratio 8.5. Such a result means that the alcohol extraction is an effective way to remove sodium and potassium in preparing highly purified lithium chloride.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第11期1251-1254,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(50504006).
关键词
乙醇
萃取
除钙
高纯氯化锂
alcohol
extraction
decalcification
highly purified lithium chloride
