環保專案成果報告查詢系統

專案計畫編號	EPA-105-XB07
經費年度	105
計畫經費	1,000 千元
專案開始日期	2016/01/01
專案結束日期	2016/11/30
專案主持人	陳康興
主辦單位	回收基管會
承辦人	廖淑秋
執行單位	國立中山大學
專案分類	廢棄物管理
中文關鍵字	微波系統、超音波、廢棄鋰電池、鈷
英文關鍵字	Microwave system, Ultrasonic, Waste lithium batteries, Cobalt
協同主持人	林淵淙
共同主持人
計畫聯絡人	賴俊諾
計畫聯絡電話	07-5252000#4420
計畫聯絡信箱	gino11814@gmail.com

中文摘要	近年來3C產品蓬勃發展，使全球鋰電池的使用越來越普遍，但如何處理鋰電池電子廢棄物是一大課題。因鋰電池中含有稀少金屬鈷，所以將鋰電池拆解分類後再回收提取價值較高的物質是一較經濟且環保的作法。本研究蒐集廢手機電池中鈷酸鋰及鎳錳鈷酸鋰等正極材料，以硫酸、檸檬酸與琥珀酸等三種酸液比較傳統加熱浸漬、微波輔助浸漬與超音波輔助浸漬溶出鋰電池正極材料中金屬鈷之差異性。實驗結果證明微波浸漬與超音波浸漬皆可有效提升金屬鈷之溶出率，其中以微波搭配硫酸輔助溶鈷效果最佳，其條件為利用2M之硫酸並添加2 vol%之雙氧水作為還原劑，在固液比為25g/L、溫度80℃之條件下浸漬5分鐘，溶出率可達100%。微波相較傳統浸漬可減少12倍的時間，且固液比可由20g/L提升至25g/L，有效節省時間及成本。後續經由添加過錳酸鉀去除溶液中雜質錳，於最佳條件pH=2、MRMK=1.5、反應時間60分鐘下錳之去除率可達97.65%。萃取部分利用D2EHPA作為萃取劑萃取酸液中之鈷離子，最佳條件在pH=5、萃取O:A比=1及萃取劑濃度0.25M反應60分鐘，鈷萃取率為93.48%。以5M鹽酸反萃取40分鐘，經反萃後之反萃液中鈷含量可高達95.97%。最後於最佳條件下進行電解，金屬鈷之回收率可接近98%，純度可達98.07%，顯示本研究之技術，可提升廢二次鋰離子電池回收鈷金屬的純度與價值。
中文關鍵字	微波系統、超音波、廢棄鋰電池、鈷

中文摘要

　　近年來3C產品蓬勃發展，使全球鋰電池的使用越來越普遍，但如何處理鋰電池電子廢棄物是一大課題。因鋰電池中含有稀少金屬鈷，所以將鋰電池拆解分類後再回收提取價值較高的物質是一較經濟且環保的作法。本研究蒐集廢手機電池中鈷酸鋰及鎳錳鈷酸鋰等正極材料，以硫酸、檸檬酸與琥珀酸等三種酸液比較傳統加熱浸漬、微波輔助浸漬與超音波輔助浸漬溶出鋰電池正極材料中金屬鈷之差異性。實驗結果證明微波浸漬與超音波浸漬皆可有效提升金屬鈷之溶出率，其中以微波搭配硫酸輔助溶鈷效果最佳，其條件為利用2M之硫酸並添加2 vol%之雙氧水作為還原劑，在固液比為25g/L、溫度80℃之條件下浸漬5分鐘，溶出率可達100%。微波相較傳統浸漬可減少12倍的時間，且固液比可由20g/L提升至25g/L，有效節省時間及成本。後續經由添加過錳酸鉀去除溶液中雜質錳，於最佳條件pH=2、MRMK=1.5、反應時間60分鐘下錳之去除率可達97.65%。萃取部分利用D2EHPA作為萃取劑萃取酸液中之鈷離子，最佳條件在pH=5、萃取O:A比=1及萃取劑濃度0.25M反應60分鐘，鈷萃取率為93.48%。以5M鹽酸反萃取40分鐘，經反萃後之反萃液中鈷含量可高達95.97%。最後於最佳條件下進行電解，金屬鈷之回收率可接近98%，純度可達98.07%，顯示本研究之技術，可提升廢二次鋰離子電池回收鈷金屬的純度與價值。

中文關鍵字

微波系統、超音波、廢棄鋰電池、鈷

類型	檔名	檔案大小	說明	最新版公開日期
期末報告	EPA-105-XB07 廢鋰電池中金屬回收技術開發期末報告.pdf	5MB		2017/2/1 上午 12:00:00

摘要	In recent years, the widespread usage of lithium batteries had led to a large amount of waste. Therefore, recovery of cobalt from waste ithium batteries was the most economic benefits. The purpose of this study was to compare three different methods which were conventional, microwave heating and ultrasonic heating on leaching process. Using 2M sulfuric acid, reducing agent proportion of 2 vol%, temperature of 80 ℃, reaction time of 5 minutes and the ratio of solid-liquid was 25g/L. The cobalt cobalt was up to 100% from the leaching liquor under microwave heating system and reaction time would be greatly reduced about 12 times, compared to traditional methods. For the separation of manganese, 0.5 mol L−1 KMnO4 solution was drop-wise added to the leaching liquor to selectively precipitate Mn2+ under optimized experimental conditions. And about 97.65% Mn2+ is precipitated at equilibrium pH = 2.0, MRMK = 1.5 and reaction time of 60 minute. Therefore, the advisable equilibrium pH would be 5, O:A=1 at room temperature, the Co2+ was extracted by D2EHPA and then about 93.48% Co2+ can be extracted. The stripping was carried out at the 5M of hydrochloric acid, reaction time of 10 minute. The solution that contained the cobalt was metalized by electrolytic reﬁning, and the ﬁnal purity of the cobalt metal was up to 98.07%.
英文關鍵字	Microwave system, Ultrasonic, Waste lithium batteries, Cobalt

摘要

In recent years, the widespread usage of lithium batteries had led to a large amount of waste. Therefore, recovery of cobalt from waste ithium batteries was the most economic benefits. The purpose of this study was to compare three different methods which were conventional, microwave heating and ultrasonic heating on leaching process. Using 2M sulfuric acid, reducing agent proportion of 2 vol%, temperature of 80 ℃, reaction time of 5 minutes and the ratio of solid-liquid was 25g/L. The cobalt cobalt was up to 100% from the leaching liquor under microwave heating system and reaction time would be greatly reduced about 12 times, compared to traditional methods. For the separation of manganese, 0.5 mol L−1 KMnO4 solution was drop-wise added to the leaching liquor to selectively precipitate Mn2+ under optimized experimental conditions. And about 97.65% Mn2+ is precipitated at equilibrium pH = 2.0, MRMK = 1.5 and reaction time of 60 minute. Therefore, the advisable equilibrium pH would be 5, O:A=1 at room temperature, the Co2+ was extracted by D2EHPA and then about 93.48% Co2+ can be extracted. The stripping was carried out at the 5M of hydrochloric acid, reaction time of 10 minute. The solution that contained the cobalt was metalized by electrolytic reﬁning, and the ﬁnal purity of the cobalt metal was up to 98.07%.

英文關鍵字

Microwave system, Ultrasonic, Waste lithium batteries, Cobalt