Method for recovering indium from indium-containing material
AssigneeDowa Metals & Mining Co., Ltd.
InventorsNobuaki Kita, Yuzuru Nakamura, Akira Tsukada
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Abstract
The present invention provides a recovery method in which the indium sponge that is deposited by substitution in the substitution deposition step in the recovery of indium from an indium-containing material is produced in the form of a powder rather than in a bulky form. This recovery method is a method in which an indium sponge is deposited by substitution by adding a substance containing chlorine, and further adding a reducing agent, to an indium-containing solution whose pH has been adjusted to a value in the range of 1 to 2.2.
Claims6
A method for recovering indium from an indium-containing material, comprising:
- a step of adding a substance containing chlorine to an indium-containing solution whose pH has been adjusted to a value in the range of 1 to 2.2 so that the value of the molar ratio of Cl/In is adjusted to a value that is greater than 0 but no greater than 0.68;
- a step of adding a reducing agent to the indium-containing solution to which said substance containing chlorine has been added, and depositing an indium sponge by substitution;
- and
- a step of extracting indium from said indium sponge in an acid solution.
Dependencies are inferred from the claim text.