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首页> 外文期刊>RSC Advances >Extraction of cobalt(ii) by methyltrioctylammonium chloride in nickel(ii)-containing chloride solution from spent lithium ion batteries
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Extraction of cobalt(ii) by methyltrioctylammonium chloride in nickel(ii)-containing chloride solution from spent lithium ion batteries

机译：氯化镍（II）氯化镍氯化钴（II）的萃取 - 氯化锂离子电池氯化物溶液

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摘要

Spent lithium batteries contain valuable metals such as cobalt, copper, nickel, lithium, etc. After pretreatment and recovery of copper, only cobalt, nickel and lithium were left in the acid solution. Since the chemical properties of cobalt and nickel are similar, separation of cobalt from a solution containing nickel is technically challenging. In this study, Co(ii) was separated from Ni(ii) by chelating Co(ii) with chlorine ions, Co(ii) was then extracted from the aforementioned chelating complexes by methyltrioctylammonium chloride (MTOAC). The effects of concentrations of chlorine ions in the aqueous phase ([Cl-](aq)), MTOAC concentrations in organic phase ([MTOAC](org)), ratios of organic phase to aqueous phase (O/A), and the initial aqueous pH on cobalt separation were studied. The results showed that [Cl-](aq) had a significant impact on cobalt extraction efficiency with cobalt extraction efficiency increasing rapidly with the increase in [Cl-](aq). The effect of initial pH on cobalt extraction efficiency was not significant when it varied from 1 to 6. Under the condition of [Cl-](aq) = 5.5 M, [MTOAC](org) = 1.3 M, O/A = 1.5, and pH = 1.0, cobalt extraction efficiency reached the maximum of 98.23%, and nickel loss rate was only 0.86%. The stripping rate of cobalt from Co(ii)-MTOAC complexes using diluted hydrochloric acid was 99.95%. By XRD and XRF analysis, the recovered cobalt was in the form of cobalt chloride with the purity of cobalt produced reaching 97.7%. The mode of cobalt extraction was verified to be limited by chemical reaction and the kinetic equation for cobalt extraction was determined to be: R-(Co) = 4.7 x 10(-3)[MTOAC]((org))(1.85)[Co]((aq))(1.25).
机译：锂电池含有钴，铜，镍，锂等含有贵重金属，在预处理和回收铜后，仅在酸溶液中留下钴，镍和锂。由于钴和镍的化学性质是相似的，因此从含镍的溶液中分离钴在技术上是具有挑战性的。在该研究中，通过用氯离子螯合CO（II）与Ni（II）分离CO（II），然后通过甲基三酰氯（MTOAC）从上述螯合络合物中萃取CO（II）。氯离子浓度在水相中（[Cl - ]（Aq））中的浓度（[Cl - ]（Aq），MtOAc浓度（[MtOAc]（ORG）），有机相的比例与水相（O / A），以及研究了初始含水pH水溶液。结果表明，[Cl - ]（AQ）对钴萃取效率的显着影响随着钴提取效率随着[Cl - ]（AQ）的增加而迅速增加。当在[Cl - ]（AQ）= 5.5M，[MtOAc]（ORG）= 1.3M，O / A = 1.5的条件下，初始pH对钴提取效率对钴提取效率的影响并不显着。 ，并pH = 1.0，钴萃取效率达到最大98.23％，镍损失率仅为0.86％。使用稀盐酸的CO（II）-MTOAC复合物的汽油钴含量为99.95％。通过XRD和XRF分析，回收的钴以氯化钴的形式，具有达到97.7％的钴的纯度。鉴定钴萃取模式以受化学反应的限制，测定钴萃取的动力学方程是：R-（CO）= 4.7×10（-3）[MtOAc]（（ORG））（1.85）[ CO]（（aq））（1.25）。

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  • 来源
    《RSC Advances》 |2019年第39期|共11页
  • 作者

    Cheng Jiehong; Lu Tao; Wu Xiao; Zhang Haojing; Zhang Chunyong; Peng Ching-An; Huang Shouqiang;

  • 作者单位

    Jiangsu Univ Technol Sch Chem &

    Environm Engn Changzhou 213001 Peoples R China;

    Jiangsu Univ Technol Sch Chem &

    Environm Engn Changzhou 213001 Peoples R China;

    Univ Idaho Dept Biol Engn Moscow ID 83844 USA;

    Jiangsu Univ Technol Sch Chem &

    Environm Engn Changzhou 213001 Peoples R China;

    Jiangsu Univ Technol Sch Chem &

    Environm Engn Changzhou 213001 Peoples R China;

    Univ Idaho Dept Biol Engn Moscow ID 83844 USA;

    Jiangsu Univ Technol Sch Chem &

    Environm Engn Changzhou 213001 Peoples R China;

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