METHOD FOR RECOVERING LITHIUM SALT

摘要

PROBLEM TO BE SOLVED: To provide a method for stably recovering a lithium salt for a long period of time by electrodialysis using an ion exchange membranes excellent in durability, which can efficiently recover a lithium salt from a solution containing lithium ions.SOLUTION: There is provided a method for recovering a lithium salt by treating water containing lithium ions by an electrodialyzer in which a cation exchange membrane and an anion exchange membrane are alternately arranged between a cathode and an anode, wherein an ion exchange membrane including a copolymer (P) comprising a vinyl alcohol-based polymer component (A), a vinylene-based polymer component (B) and a polymer component (C) having an ionic group as constituent components is used as the cation exchange membrane and/or the anion exchange membrane.SELECTED DRAWING: None