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US 2024/0344170 A1Published application
Methods for recovering critical elements from leach solutions
OwnerRick HONAKER, Wencai ZHANG +1inventors
InventorsRick HONAKER, Wencai ZHANG, Li QI
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Abstract
Methods for separating and recovering Mn, Co, and Ni from leach solutions include selectively recovering and producing high purity products of Mn, Co, and Ni from leach solutions, combining staged precipitation, sulfide precipitation, and solvent extraction to separate contaminants from the leach solution to isolate and recover Mn, Co, and Ni in high yield and purity.
Claims60
A method for recovering manganese ions from a leach solution, the method comprising:
- (a) optionally mixing the leach solution with an oxidant to produce a first composition;
- (b) adding a base to the first composition or to the leach solution to produce a second composition, wherein the second composition comprises a second supernatant and a second precipitate;
- (c) separating the second supernatant from the second composition;
- (d) adding a base to the second supernatant to produce a third composition, wherein the third composition comprises a third supernatant and a third precipitate;
- (e) separating the third supernatant from the third composition;
- (f) adding a base to the third supernatant to produce a fourth composition, wherein the fourth composition comprises a fourth supernatant and a fourth precipitate;
- (g) separating the fourth precipitate from the fourth composition;
- (h) adding an acid to the fourth precipitate to produce a fifth composition, wherein the fifth composition comprises a fifth supernatant and a fifth precipitate;
- and
- (i) separating the fifth precipitate from the fifth composition, wherein the fifth precipitate is enriched with manganese ions.
7 more elements
Dependencies are inferred from the claim text.