Method for utilizing eutecticevaporate solvent for leaching valuable metal in waste lithium ion batteries

[0023] The leaching of lithium, cobalt, nickel, manganese in waste nickel-cobalt lithium manganate battery in embodiment 1

[0024] Mix choline chloride and lactic acid at a molar ratio of 1:1, heat and stir at 60°C for 12 hours to prepare a deep eutectic solvent; discharge and mechanically pulverize the pretreated waste lithium battery powder (described The powder is obtained by mixing and crushing the positive and negative electrodes of waste lithium-ion batteries, the shell, etc. The positive electrode material is nickel-cobalt lithium manganese oxide material, the negative electrode is graphite, and contains aluminum, copper and a small amount of crushed aluminum and copper introduced by the positive and negative current collectors. Iron) was added to the above-mentioned deep eutectic solvent and mixed thoroughly. The solid-to-liquid ratio of the battery powder and the deep eutectic solvent was 85g / L. Ultrasonic vibration was performed at 20°C with a power of 480w for 200mi...

[0025] The leaching of lithium, cobalt, nickel, manganese in the waste nickel-cobalt lithium manganate battery of embodiment 2

[0026] Choline chloride and malonic acid were mixed at a molar ratio of 1.5:1, heated and stirred at 90°C for 11 hours to obtain a deep eutectic solvent; the waste lithium battery powder ( The powder is obtained by mixing and crushing the positive and negative electrodes of waste lithium-ion batteries, the shell, etc., the positive electrode material is nickel-cobalt lithium manganese oxide material, the negative electrode is graphite, and contains aluminum, copper and a small amount of broken materials introduced by the positive and negative current collectors. The imported iron) was added to the above-mentioned deep eutectic solvent and mixed thoroughly, the solid-liquid ratio of the battery powder and the deep eutectic solvent was 50g / L, and the power of 500w was ultrasonically oscillated for 180min at 25°C. Stand still and filter to obtain the le...

[0027] The leaching of lithium, cobalt, nickel, manganese in the waste nickel-cobalt lithium manganate battery of embodiment 3

[0028] Mix choline chloride and citric acid at a molar ratio of 2:1, heat and stir the reaction at 70°C for 10 hours to obtain a deep eutectic solvent; discharge and mechanically pulverize the pretreated waste lithium battery powder ( The powder is obtained by mixing and crushing the positive and negative electrodes of waste lithium-ion batteries, the shell, etc., the positive electrode material is nickel-cobalt lithium manganese oxide material, the negative electrode is graphite, and contains aluminum, copper and a small amount of broken materials introduced by the positive and negative current collectors. The iron brought in) was added to the above-mentioned deep eutectic solvent and mixed thoroughly. The solid-liquid ratio of the battery powder and the deep eutectic solvent was 60g / L. Ultrasonic vibration was performed at 30°C with a power of 400w ...