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研究了采用双酮/磷酸酯萃取体系从废旧锂电池正极浸出液中分离有价元素，通过平衡萃取确定了双酮/磷酸酯萃取体系萃取分离钴、镍、锰、锂的最佳工艺条件。结果表明：双酮/磷酸酯萃取体系可通过工艺调控，有效实现废旧锂电池浸出液中钴镍锰和锂的分离；在优化条件下，钴、镍、锰萃取率均可达99%,锂收率可达95%以上。该法实现了单一萃取体系分离回收钴、镍、锰、锂，可为废旧三元锂电回收提供一条新的工艺路线。
Abstract：Extraction and separation of valuable elements from the positive leaching solution of spent lithium-ion batteries by β-diketone/phosphate extraction system was studied.The optimal conditions for the extraction and separation of cobalt, nickel, manganese, and lithium were determined through equilibrium extraction.The results show that the β-diketone/phosphate extraction system can effectively separate cobalt, nickel, manganese, and lithium from the positive leaching solution of spent lithium-ion batteries by controlling the kinetics.Under optimized conditions, the extraction rate of cobalt, nickel, and manganese can reach 99%,and the yield of lithium can reach more than 95%.The method realizes the separation and recovery of cobalt, nickel, manganese and lithium by a single extraction system, which can provide a new process route for the recovery of waste ternary lithium batteries.
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Basic Information:
DOI：10.13355/j.cnki.sfyj.2025.04.005
China Classification Code:X705
Citation Information:
[1]胡康,张利诚,马春梅等.双酮/磷酸酯萃取体系从废旧锂电池正极浸出液中分离有价元素试验研究[J].湿法冶金,2025,44(04):467-475.DOI:10.13355/j.cnki.sfyj.2025.04.005.
Fund Information:
国家自然科学基金青年项目(22208359); 青海省应用基础研究项目(2024-ZJ-703); 中科院青年创新促进会项目(2022438)