I hate to be the one shooting ideas down, but the molten alkali/alkaline metal reductions require a certain outlay of money or some incredible luck in
procurement. You need a tank of high grade inert gas, a regulator, means to utterly seal the reactor during the reaction, a way to handle the reduced
metal recovery, a reactor which won't contaminate the metal. Isolation of impure materials may be doable, but without lab grade equipment, you're not
likely to achieve pure materials. And, the temperature of molten lithium is far too low to achieve most salt reductions of transition metals and
above.
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