| 摘要 |
PROBLEM TO BE SOLVED: To provide an acid recovery method using an ion-exchange membrane which is capable of efficiently recovering acid from a waste acid liquid, has high durability and hardly deteriorates an ion exchange performance even if an electrodialyzer is operated for a long time.SOLUTION: There is provided an acid recovery method using the cation and anion exchange membranes by electrodialysis. The method uses anion exchange membrane containing a copolymer (P) including a vinyl alcohol-based polymer component (A), a vinylene-based polymer component (B) and a polymer component (C) having an ionic group as the constituents of the cation and/or anion exchange membranes.SELECTED DRAWING: None |
