隨3C產品及電動車市場蓬勃發展，鋰離子電池使用量也隨之提高，而在台灣尚未有專門處理此電池的資源化廠，因此本論文針對廢棄鋰離子電池中有價金屬Ni、Co、Li、Mn之分離進行研究，主要透過離子交換法搭配溶媒萃取法將其分離，以利後續高純度回收原料之生產。
以螯合型陽離子交換樹脂M4195進行離子交換對四種金屬做選擇性之研究，M4195對目標金屬的選擇性依序為Ni> Co > Mn > Li，且在pH值實驗中，四種金屬的選擇性隨著pH值越高，樹脂對四種金屬的吸附效果越好。
將浸漬液稀釋後調整至pH=4，進料濃度約為2000ppm並以固定流速通入裝有M4195樹脂之管柱進行離子交換反應，樹脂吸附進料液中親和力較高的Co、Ni，而收集交換尾液中Mn、Li，操作至Co吸附飽和後，以固定流速通入脫附劑2N H2SO4將負載於M4195樹脂上的Co、Ni脫附富集後，將脫附液作為第二部分溶媒萃取的進料。
透過溶媒萃取進行Co、Ni分離，並使用萃取效率，分離係數，分配比來作為指標數據。利用Na-Cyanex 272透過調整皂化率、平衡pH值、萃取劑濃度、油水比、萃取時間、震盪速度等參數來萃取Co2+，已達到Co之最佳萃取率99.93%，而Ni之萃取率大約在1%。再利用硫酸進行反萃取，改變反萃取濃度、油水比、反應時間等，可達到最佳之反萃取效率為99.62%。

With the rapid development of 3C products and electric vehicle market, the use of lithium-ion batteries increases. Therefore, this thesis focuses on the separation of valuable metals Ni, Co, Li, and Mn from spent lithium-ion batteries.The solvent extraction and ion exchange are the methods used in this study.
According to the research results, adjust the leaching solution to pH=4, and it was passed through a column filled with M4195 resin for ion exchange separation. The resin selectively adsorbed Co and Ni was collected in the exchange tail. The loaded resin was eluted with 2N H2SO4, and separation and recovery of divalent cobalt and nickel ions from the eluted liquid have been carried out using sodium salts of Cyanex272 in kerosene. The percentage extraction of metal ions increased with increasing equilibrium pH. Cobalt was preferentially extracted over nickel with the extractants. Recovery of cobalt was achieved followed by stripping with H2SO4 at O:A ratio of1:1.

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