【摘要】 采用溶剂萃取—化学沉淀法从废锂离子电池正极材料中回收硫酸钴、氢氧化镍和氟化锂,比较了萃取剂P507和Cyanex272对钴、镍的萃取分离性能。试验结果表明:1-1-1型废锂离子电池正极材料浸出液经P204除锰后,用0.5 mol/L P507或0.6 mol/L Cyanex272经两级错流萃取钴,钴萃取率分别为98.21%和99.44%,镍共萃取率分别为24.42%和4.26%,锂共萃取率分别为15.84%和5.11%,Cyanex272对钴镍的萃取分离性能明显优于P507;P507和Cyanex272负载有机相分别用CoSO₄溶液和HAc-NaAc溶液洗脱共萃取的镍和锂,然后用硫酸反萃取钴,反萃取液中Co/Ni质量比分别为3 217（P507）和12 643（Cyanex272）,蒸发结晶可得高纯硫酸钴;萃余液中的镍、锂分别用NaOH和HF沉淀,可得氢氧化镍和氟化锂固体。采用此方法,废锂离子电池正极材料中的钴、镍、锂都得到有效回收。更多还原

【Abstract】 By solvent extraction-chemical precipitation process,the CoSO₄,Ni（OH）₂and LiF were recovered from the leaching solution of spent lithium ion battery cathode material.P507 and Cyanex272 separation performance for cobalt and nickel were compared.After manganese in the leaching solution is removed by solvent extraction using P204,the cobalt is extracted using 0.5 mol/L P507 or 0.6 mol/L Cyanex272 by two-stage cross-flow extraction with extraction rate of 98.21% and 99.44%,respectively and nickel co-extraction rate of 24.42% and 4.26% and lithium co-extraction rate of 15.84% and 5.11%,respectively.The separation performance of Cyanex272 for cobalt and nickel is significantly better than that of P507.The co-extracted nickel and lithium in P507 and Cyanex272 loaded organic phases can be scrubbed using CoSO₄solution and HAc-NaAc solution,respectively.Finally,the cobalt in the scrubbed organic phase can be complete stripped using H₂SO₄ solution.The cobalt/nickel in the stripping solution are 3 217（P507） and 12 643（Cyanex272）,the high purity cobalt sulfate solution is obtained.NaOH and HF are used as precipitants to precipitate nickel and lithium in the raffinate in the form of nickel hydroxide and lithium fluoride.Using the method,the cobalt,nickel and lithium can be recovered effectivily.更多还原