东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2006, Vol. 27 ›› Issue (12): 1362-1364.DOI: -

• 论著 • 上一篇    下一篇

熔盐萃取法深度除去金属锂中钠和钾的热力学分析

金哲男;郑贵山;张福顺;李席孟;   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-23 修回日期:2013-06-23 出版日期:2006-12-15 发布日期:2013-06-23
  • 通讯作者: Jin, Z.-N.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50504006)

Thermodynamic analysis of effective Na/K removal from metallic lithium by molten salt extraction

Jin, Zhe-Nan (1); Zheng, Gui-Shan (1); Zhang, Fu-Shun (1); Li, Xi-Meng (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2006-12-15 Published:2013-06-23
  • Contact: Jin, Z.-N.
  • About author:-
  • Supported by:
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摘要： 针对传统锂工业中很难得到低钠和钾的金属锂,首次提出了溶盐萃取法,并进行了萃取过程的热力学分析和探索性实验研究.热力学计算结果表明,在923 K的萃取温度下,钾不仅能够直接与LiCl进行反应,而且还能与Li2Cl进行反应,而钠只能与Li2Cl进行反应,因此利用高纯氯化锂萃取金属锂中的钠和钾是可行的.探索性实验结果表明,熔盐萃取法可除去金属锂中的钠和钾,尤其是除钾效果比较明显,这与热力学分析结果基本吻合.

关键词: 熔盐萃取, 除钠和钾, 金属锂, 热力学分析, 高纯氯化锂

Abstract: It is conventionally difficult to obtain metallic lithium with ultra low Na/K content, to which the molten salt extraction is therefore suggested as a pioneer process to remove Na/K and relevant experiments. The thermodynamic analysis showed that K can react with both LiCl and Li2Cl, but Na can only react with Li2Cl, when using high-purity LiCl as extractant 923 K. So, removing Na/K from Li by molten salt extraction process is theoretically feasible. Furthermore, the experimental results also revealed that the molten salt extraction an effective way to remove Na and K, especially the K from metallic lithium, which is basically in conformity to the thermodynamic analysis.

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