Method for separating metal components
AssigneesSumitomo Electric Industries, Ltd., National Institute of Advanced Industrial Science and Technology
InventorsTomoyuki Awazu, Masatoshi Majima, Mitsutaka Tsubokura, Tetsuo Oishi
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Abstract
A method for separating metal components from a treatment material containing a silicate and metal elements includes: a reaction step of reacting the treatment material and a molten alkali hydroxide in which bubbles due to water vapor derived from water are generated by heating a hydroxide of an alkali metal or an alkaline-earth metal and the water in a state where the hydroxide and the water coexist, to obtain a reaction product; and a first precipitation step of dissolving the reaction product of the treatment material and the molten alkali hydroxide after the reaction step in water, thereby generating a precipitate containing the metal elements.
Claims22
A method for separating metal components derived from metal elements, from a treatment material containing a silicate and the metal elements, the method comprising:
- a reaction step of reacting the treatment material and a molten alkali hydroxide in which bubbles due to water vapor derived from water are generated by heating a hydroxide of an alkali metal or an alkaline-earth metal and the water in a state where the hydroxide of the alkali metal or the alkaline-earth metal and the water coexist, to obtain a reaction product;
- and
- a first precipitation step of dissolving the reaction product of the treatment material and the molten alkali hydroxide after the reaction step in water to generate a precipitate containing the metal elements in an obtained solution,
- wherein the hydroxide of the alkali metal or the alkaline-earth metal and the water are heated at a heating rate of 7° C./min or higher in the reaction step.
Dependencies are inferred from the claim text.