因為3C產品以及電動汽機車的市場發展迅速，人類對鋰離子電池的需求量也大幅上升，在處理廢鋰離子電池時，常以濕法冶金的方式來做處理，在鋰離子電池正極材料的浸漬液中，含有有價金屬Ni、Co、Li、Mn四種主要金屬，其中以Ni、Co性質最為相近且最難分離，因此本論文針對鋰離子電池正極材料的浸漬液中有價金屬之分離進行研究，主要透過離子交換技術將Ni、Co金屬分離，以利後續高純度回收原料之生產。
　　以管柱法分別對上述四種元素進行選擇性的研究，研究的結果螯合型陽離子交換樹脂(M4195)對目標金屬的選擇性依序為Ni> Co > Mn > Li，且在pH值實驗中，四種金屬的選擇性也是越高越好。
　　將浸漬液稀釋後調整至pH=1，進料濃度約為2000ppm並以固定流速通入填充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Ni以及少量的Co，而收集交換尾液中Co、Mn、Li，操作至Ni吸附飽和後，以固定流速通入脫附劑6NH2SO4將負載於M4195樹脂上的Ni脫附富集，後將上方收集之交換尾液調整至pH=2，以固定流速通入填充M4195樹脂之管柱進行離子交換反應，樹脂吸附進料中親和力較高的Co，而Mn、Li則隨交換尾液排出並收集，操作至Co吸附飽和後，以固定流速通入脫附劑2NH2SO4將負載於M4195樹脂上的Co脫附富集，後將收集之交換尾液調整至pH=5，以(NH4)2S2O8作為沉澱劑使Mn氧化沉澱而分離，Mn分離率約為99%，藉此達到將廢鋰離子電池正極材料之浸漬液中有價金屬分離。

With the market for 3C products and electric vechicle is developing rapidly, the demand for lithium-ion batteries has also increased dramatically. When dealing with waste lithium-ion batteries, hydrometallurgy methods were usually used to recover metals in the cathode materials of lithium-ion batteries. The sample contains four main valuable metals Ni, Co, Li and Mn. Among them, Ni and Co are the most similar in chemical properties and most difficult to separate.
Due to the strong adsorption behavior of Ni on M4195 resin in pH=1, Ni was separated first when the sample was passed through a column filled with M4195 resin for ion exchange separation. The loaded resin was then eluted with 6N H2SO4. The remaining liquid was passed through a column filled with M4195 resin for ion exchange separation in pH=2 again. The loaded resin was eluted with 2N H2SO4.Then the remaining liquid only contains Mn and Li. Using (NH4)2S2O8 as a precipitant to separate Mn by selective precipitation. The remaining liquid after precipitation only contains Li and the valuable metals Ni, Co, Li, and Mn in the leaching solution were separated and recovered.

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