OXIDATIVE AND REDUCTIVE LEACHING METHODS
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United States of America
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Jan 30, 2025
app pub date -
Dec 6, 2022
filing date -
Dec 6, 2022
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Abstract
Disclosed herein are methods for leaching a material comprising one or more metals in a zero oxidation state and one or more chosen from metal oxides, metal hydroxides, and combinations thereof, wherein the method comprises contacting the material with an oxidizing acidic aqueous solution having a pH less than 6, and subsequently reducing the one or more chosen from metal oxides, metal hydroxides, and combinations thereof with a reducing agent. Also disclosed are methods comprising leaching a material to obtain an aqueous solution comprising metal ions, and separating the metal ions to obtain at least one essentially pure metal ion solution and/or at least one essentially pure solid metal ion salt. Further disclosed are methods comprising mechanically comminuting a material to obtain a black mass, and leaching the black mass.
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