| 摘要 |
<p>PROBLEM TO BE SOLVED: To efficiently release the metallic foil from an electrode material, to separately recover the foil and material and to recover the useful metal by bringing the metallic foil-coated waste material into contact with a removing soln. consisting essentially of an org. soln. of an alkylphosphoric acid. SOLUTION: An electrode material contg. a metallic compd. of cobalt, etc., is coated with a metallic foil to obtain the positive electrode of a secondary battery. The metallic foil-coated waste material of the secondary battery is brought into contact with a removing soln. consisting essentially of an org. soln. of an alkylphosphoric acid. A water-insoluble petroleum solvent such as kerosine is preferably used as the org. solvent constituting the org. soln., and the concn. of the alkylphosphoric is preferably controlled to 0.01 to 50wt.%. Water is added to the removing soln. by 0.01-30%, and the obtained emulsion removing soln. is preferably used as the removing soln. As a result, the metallic foil and electrode material of the waste material are released from each other easily and efficiently and separately recovered, and a useful metal is efficiently recovered with high purity.</p> |
