CPC C22B 3/06 (2013.01) [C22B 3/22 (2013.01); C22B 34/24 (2013.01)] | 9 Claims |
1. A method for liquefying niobium or tantalum comprising the steps of:
forming a molten substance by making a mixture of an ammonium salt and a powdered substance containing at least one element of niobium or tantalum;
dissolving the molten substance, which has been solidified, in a predetermined amount of solvent to form a suspension;
subjecting the suspension to solid-liquid separation into a precipitate and a liquid; and
dissolving the precipitate by reaction with an acid solution.
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