Electrolytic method of producing a high purity aluminum-lithium

Details Electrolytic method of producing a high purity aluminum-lithium Electrolytic method of producing a high purity aluminum-lithium

1984-10-17

1985-06-04

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

C25C 336

Patent

active

045212848

ABSTRACT:
A method of producing high purity aluminum-lithium mother alloys essentially free from other alkali metals than lithium, which comprises electrolyzing a mixed molten salts consisting of 34 to 64 wt. % of lithium chloride and 66 to 36 wt. % of potassium chloride, and, optionally, 1 to 20 wt. % of sodium chloride based on a combined weight of the aforesaid two components, using solid aluminum as cathodes, and an .alpha.+.beta. phase aluminum lithium alloy electrode or the alloy coated electrode as a reference electrode, under a current density in the range of 0.005 to 1 A/cm.sup.2, whereby producing aluminum-lithium alloys on the cathode. During electrolyzing, the potential difference between the cathode and the reference electrode is continuously measured and differentiated with respect to time and at the point of a sudden change in the differentiated value, electrolyzing is stopped.

REFERENCES:
patent: 1901407 (1933-03-01), Osborg
patent: 3822195 (1974-07-01), Dell et al.

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