| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a valuable-metal recovery method for recovering metals from lithium-ion batteries without using cumbersome steps and using comparatively simple equipment. <P>SOLUTION: A positive-electrode material containing a lithium/transition-metal element composite oxide is dissolved in an acid solution; the resulting acidic solution containing lithium ions and transition-metal ions is passed through a base anion-exchange resin; and the metal ions are separated by recovering a solution eluted from the anion-exchange resin over an initial period (D) into a first container, the solution having high relative concentration of transition-metal ions, and recovering a solution eluted over a subsequent period (E) into a second container, the solution having high relative concentration of lithium ions. <P>COPYRIGHT: (C)2012,JPO&INPIT |
