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基于使用苯甲酰三氟丙酮 (HBTA)、三辛基氧化膦 (TOPO) 和绿色煤油的 β-二酮溶剂萃取，提出了一种从混合溶液中回收钴、镍和锂的方法。通过实验评估了有效的金属回收和分离参数，如溶液 pH 值、皂化度、萃取时间和相比。结果表明，钴和镍通过不同相比的两段错流萃取回收，锂通过三段逆流萃取回收。使用无机酸溶液汽提载有金属的有机相以获得浓缩钴、镍和锂的溶液。钴和镍浓缩溶液中的 Co/Ni 和 Ni/Co 摩尔比分别为 54.4 和 164，4  mg L -1在富锂溶液中。对萃取机理进行了研究，结果表明Co 2+和Ni 2+是通过离子交换萃取的，其中两摩尔H +或Na +被二价金属离子取代。Li +萃取化学计量通过培养单晶来研究。由于钴、镍和锂是通过一次提取回收的，因此不需要其他有机物质。这项工作提供了一种从废锂电池中回收有价值金属的可持续、环保和通用的方法。

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A method of recovering cobalt, nickel, and lithium from mixed solutions was proposed based on β-diketone solvent extraction using benzoyltrifluoroacetone (HBTA), trioctylphosphine oxide (TOPO), and green kerosene. The effective metal recovery and separation parameters such as solution pH, saponification degree, extraction time, and phase ratio were evaluated experimentally. The results indicated that cobalt and nickel were recovered through 2-stage cross-current extraction at different phase ratios and that lithium was recovered through three-stage countercurrent extraction. The metal-loaded organic phase was stripped using an inorganic acid solution to obtain cobalt-, nickel-, and lithium-concentrated solutions. The Co/Ni and Ni/Co molar ratios in the cobalt- and nickel-concentrated solutions were 54.4 and 164, respectively, and the lithium concentration reached 1.78 × 104 mg L−1 in the lithium-enriched solution. The extraction mechanism was studied, and the results revealed that Co2+ and Ni2+ were extracted by ion exchange in which two moles of H+ or Na+ had been replaced by divalent metal ions. The Li+ extraction stoichiometry was studied by cultivating single crystals. Because cobalt, nickel, and lithium were recovered by single extraction, no other organic substances were required. This work provides a sustainable, environmentally friendly, and versatile method of recovering valuable metals from spent lithium batteries.