Refining of lithium-containing aluminum scrap

Details Refining of lithium-containing aluminum scrap Refining of lithium-containing aluminum scrap

1987-11-04

1988-12-13

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

C25C 306

Patent

active

047909170

ABSTRACT:
A method of refining lithium-containing aluminum scrap metal. An electrolytic cell is formed using molten scrap as the anode, lithium or Al-Li as the cathode and a chloride-based lithium electrolyte. The cell is operated at a temperature of about 700.degree. C. and the lithium is transferred from the scrap to the cathode. The depletion of lithium in the scrap is signalled by an abrupt rise in voltage of the cell. The remaining scrap at the anode can be used in the same way as conventional aluminum scrap and the pure Li or Al-Li alloy formed at the cathode can be used as new material for the Al-Li alloy market.

REFERENCES:
patent: 2787592 (1957-04-01), Burkhardt
patent: 4521284 (1985-06-01), Tanabe et al.
patent: 4533442 (1985-08-01), Neelameggham et al.
Chemical Abstracts, vol. 99, No. 3, 18th Jul. 1983, p. 542, Abstract No. 221017g.
Miscibility of Lithium With Lithium Chloride and Lithium Chloride-Potassium Chloride Eutectic Mixture, Nakajima et al., Bulletin of the Chemical Society of Japan, vol. 47(8), 2071-2072 (1974).

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