Method for recovering polyoxoanion compound

Abstract

A method for recovering a polyoxoanion compound from an aqueous solution containing the polyoxoanion compound which comprises the following steps: Step (1): a step of mixing an organic solvent capable of forming a complex with the above-mentioned polyoxoanion compound with the above-mentioned aqueous solution followed by separating to a first phase containing the above-mentioned polyoxoanion compound and the above-mentioned organic solvent, and a second phase, Step (2): a step of mixing a hydrophobic organic solvent with the above-mentioned first phase followed by separating to an organic phase containing the above-mentioned organic solvent and the above-mentioned hydrophobic organic solvent, and an aqueous phase containing the above-mentioned polyoxoanion compound.

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