Process for purifying lithium

Details Process for purifying lithium Process for purifying lithium

1986-04-16

1988-04-19

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 66, 75 1029, C22B 2612

Patent

active

047387165

ABSTRACT:
The invention relates to a process for purifying lithium in which the lithium is melted in an inert atmosphere. The molten lithium is then maintained at a temperature of 400.degree. to 700.degree. C. under a pressure of less than 10 Pascal while agitating the molten lithium to renew its exposed surface. In this manner, impurities in the lithium are virtually exclusively vaporized, without giving rise to substantial evaporation of lithium. The vaporized impurities are then condensed at a temperature of less than 100.degree. C. and the purified lithium is recovered in molten form.

REFERENCES:
Rogers et al., J. Electrochem Soc., 98(12), pp. 483-487, 1951.

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