Method of extracting lithium from aluminum-lithium alloys

Details Method of extracting lithium from aluminum-lithium alloys Method of extracting lithium from aluminum-lithium alloys

1991-04-12

1992-07-21

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

204 71, 75590, 75690, 4231795, 423499, C25C 302, C25C 336, C01D 132, C22B 2612

Patent

active

051319888

ABSTRACT:
An improved method for extracting lithium from aluminum-lithium alloys includes providing an electrorefining cell which contains a cathode comprising a pure molten tin pool and a source of lithium from a molten aluminum-lithium alloy. The lithium is extracted from the Al-Li alloy by applying an electric current through the electrorefining cell whereby lithium dissolves from the molten Al-Li alloy into the tin pool and forms a tin-lithium alloy. The formed Sn-Li alloy may be recovered by casting under a salt layer and cooled to solidification. In a further aspect, the recovered Sn-Li alloy may be processed to further recover lithium therefrom by either electrolytic recovery in a separate electrolytic cell, vacuum distillation or a chemical extraction process.

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