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US 2025/0154625 A1Published application
Method for recovering extractant in aqueous solution, and method for separating and recovering metal from aqueous metal solution
AssigneeJx Metals Circular Solutions Co., Ltd.
InventorJunichi ARAKAWA
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Abstract
A method for recovering neodecanoic acid or a phosphonate ester-based extractant from an aqueous solution containing the neodecanoic acid or the phosphonate ester-based extractant, wherein an equilibrium pH is 5.5 or less when the neodecanoic acid or the phosphonate ester-based extractant is recovered.
Claims17
A method for recovering neodecanoic acid or a phosphonate ester-based extractant from an aqueous solution comprising the neodecanoic acid or the phosphonate ester-based extractant,
- wherein an equilibrium pH is 5.5 or less when the neodecanoic acid or the phosphonate ester-based extractant is recovered.
A method for separating and recovering metals from an aqueous metal solution, the method comprising:
- a solvent extraction step of subjecting the aqueous metal solution to solvent extraction with a solvent comprising neodecanoic acid or a phosphonate ester-based extractant to extract metals contained in the aqueous metal solution;
- and
- a recovery step of recovering the neodecanoic acid or the phosphonate ester-based extractant from an extracted solution obtained after extracting the metals in the solvent extraction step,
- wherein an equilibrium pH during recovery in the recovery step is lower than an equilibrium pH during extraction in the solvent extraction step.
1 more element
Dependencies are inferred from the claim text.