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首页> 外文期刊>RSC Advances >Recovery of cobalt from spent lithium ion batteries using sulphuric acid leaching followed by solid-liquid separation and solvent extraction
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Recovery of cobalt from spent lithium ion batteries using sulphuric acid leaching followed by solid-liquid separation and solvent extraction

机译：使用硫酸浸出的锂离子电池从锂离子电池中恢复钴，然后通过固液分离和溶剂萃取

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摘要

Herein, the method of hydrometallurgy is adopted to recycle the precious metal cobalt in spent lithium ion batteries (LIBs). The best experimental conditions for leaching cobalt ions in sulphuric acid-hydrogen peroxide system are studied. The best leaching operation condition is an H2SO4 concentration of 3.0 mol L-1, liquid-solid ratio of 7 : 1 and hydrogen peroxide dosage of 1.6 mL g(-1) for 2.5 h at 70 degrees C. Using the extraction characteristics of D2EHPA (di-(2-ethylhexyl) phosphoric acid) and PC-88A (2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester) for a specific ion in different pH value leaching solutions, the best experimental conditions are D2EHPA and PC-88A saponification rates of 20% and 30%, respectively, sulfonated kerosene volume of 70%, oil-water (O/A) ratio of 1 : 1, and extraction time of 10 min. Two extractions are applied, the first extraction occurs at pH 2.70 and the second extraction is done at pH 2.60 using D2EHPA to remove copper and manganese ions. After the extraction operation, PC-88A is used to further extract the leaching solution and maintain the pH at 4.25, so that cobalt and nickel ions are effectively separated, then cobalt ions are separated by oxalic acid and cobalt oxalate is obtained. The purity of cobalt is as high as 99.50%.
机译：在此，采用氢化冶金方法来回收锂离子电池（LIBS）中贵金属钴。研究了浸出硫酸 - 氢过氧化氢体系中浸出钴离子的最佳实验条件。最佳的浸出操作条件是3.0mol L-1的H 2 SO 4浓度，液体 - 固体比为7：1和1.6ml G（-1）的过氧化氢剂量为1.6mlg（-1），在70摄氏度下为2.5小时。使用D2ehpa的提取特性（在不同pH值浸出溶液中的特定离子的特定离子的（2-乙基己基）磷酸）和PC-88a（2-乙基己基膦酸单-2-乙基己基酯），最好的实验条件是D2ehPA和PC-88A皂化分别为20％和30％的速率，磺化煤油体积为70％，油水（O / A）比例为1：1，提取时间为10分钟。施加两种萃取，第一次提取在pH 2.70时发生，第二萃取在pH 2.60下使用D2ehPa去除铜和锰离子。萃取操作后，PC-88A用于进一步提取浸出液和将pH维持在4.25，使钴和镍离子被有效地分离，然后钴离子被草酸分离，得到草酸钴。钴的纯度高达99.50％。

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  • 来源
    《RSC Advances》 |2016年第88期|共9页
  • 作者

    Wang Feng; Sun Rong; Xu Jun; Che Zheng; Kang Ming;

  • 作者单位

    Southwest Univ Sci &

    Technol Sch Mat Sci &

    Engn State Key Lab Cultivat Base Nonmet Composites &

    F Mianyang 621010 Peoples R China;

    Southwest Univ Sci &

    Technol Sch Mat Sci &

    Engn State Key Lab Cultivat Base Nonmet Composites &

    F Mianyang 621010 Peoples R China;

    Sichuan Changhong Elect Co Ltd Mianyang 621010 Peoples R China;

    Sichuan Changhong Elect Co Ltd Mianyang 621010 Peoples R China;

    Southwest Univ Sci &

    Technol Sch Mat Sci &

    Engn State Key Lab Cultivat Base Nonmet Composites &

    F Mianyang 621010 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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