| 摘要 |
PROBLEM TO BE SOLVED: To provide a valuable-metal recovery method for recovering metals from lithium ion batteries using comparatively simple equipment and without using a cumbersome process.SOLUTION: In the method, a positive electrode material from lithium ion batteries, containing lithium and a transition metal element, is dissolved in an acidic solution, thereby generating lithium ions and ions of the transition metal in the acidic solution. The acidic solution and a recovery liquid are then made to flow with an anion-permeable membrane interposed therebetween, causing the lithium ions to permeate from the acidic solution to the recovery solution. Lithium ions are then recovered from the recovery liquid containing dissolved lithium ions through the permeation. |
