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    • 5. 发明授权
    • Process and apparatus for producing high-purity lithium metal by
fused-salt electrolysis
    • 通过熔盐电解生产高纯度锂金属的方法和装置
    • US4740279A
    • 1988-04-26
    • US907069
    • 1986-09-12
    • Jurgen MullerRichard BauerBernd SermondEike Dolling
    • Jurgen MullerRichard BauerBernd SermondEike Dolling
    • C25C3/02C25C7/00
    • C25C3/02
    • This invention relates to a process of producing lithium metal by the electrolysis of fused mixed salts comprising electrolyzing fused mixed salts consisting of lithium chloride and potassium chloride in a diaphragmless electrolytic cell, withdrawing molten lithium metal from the cell to a receiver and cooling the lithium metal which has been withdrawn. To decrease the content of impurities in a continuous process, molten mixture which rises in the interelectrode space in the cell and contains lithium metal is collected in an annular zone, which surrounds the top end of the cathode adjacent to the surface level of the molten mixture, said molten mixture is withdrawn from said annular zone through a siphon pipe and is supplied from the latter to a separating chamber, which communicates with the electrolytic cell and is sealed from the chlorine gas atmosphere in the electrolytic cell, electrolyte and lithium are separated in the separating chamber under a protective gas atmosphere, lithium metal is discharged from the separating chamber into a receiver under a protective gas atmosphere, and the electrolyte is recycled from the separating chamber to the electrolytic cell. An electrolytic cell for carrying out the process is also described.
    • 本发明涉及通过熔融混合盐的电解生产锂金属的方法,包括在无隔膜电解池中电解由氯化锂和氯化钾组成的熔融混合盐,将熔融的锂金属从电池中取出到容器中并冷却锂金属 已经撤回。 为了减少连续过程中的杂质含量,在电池中的电极间空间中升高并且含有锂金属的熔融混合物被收集在环形区域中,该环形区域围绕与熔融混合物的表面水平相邻的阴极顶端 所述熔融混合物通过虹吸管从所述环形区域中排出,并从后者供给到与电解槽连通并与电解槽中的氯气气氛密封的分离室,电解质和锂分离 在保护气体环境下的分离室中,锂金属在保护气体气氛下从分离室排出到接收器中,并且电解质从分离室再循环到电解槽。 还描述了用于执行该方法的电解池。