首页|采用TFCA-4PC协同萃取体系从废旧锂离子电池酸浸液中选择性萃取镍

采用TFCA-4PC协同萃取体系从废旧锂离子电池酸浸液中选择性萃取镍

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采用一种由桐油基羧酸(TFCA)与异烟酸酯(4PC)组成的协同溶剂萃取(SSX)体系,从含Mg/Li的废旧锂离子电池(LIBs)酸浸液中选择性萃取Ni.SSX体系对Ni表现出较强的协同作用,这主要归因于TFCA可以与Ni形成较为稳定的多元螯环结构,因此,体系对Ni的选择性得到增强.在优化条件下,经过单级萃取,Ni的萃取率达到97.3％,而Mg和Li的萃取率分别为0和2.29％.随后,负载有机相经过300 mg/LNiSO4洗涤后采用 0.2 mol/LH2SO4反萃,获得的反萃液中含有11.52 g/L的Ni和＜6 mg/L的Li.
Selective extraction of nickel from acid leach solution of spent lithium-ion batteries using synergistic solvent extraction system consisting of TFCA-4PC
A synergistic solvent extraction(SSX)system consisting of tung oil-based carboxylic acid(TFCA)and isonicotinic acid ester(4PC)was proposed to selectively extract Ni over Li and Mg from acid leach solutions of spent lithium-ion batteries(LIBs).The SSX system indicates a synergistic effect of Ni which can be mainly attributed to the multiple chelate ring structure formed between TFCA and Ni,therefore resulting in strong selectivity of Ni.With optimal conditions,the extraction ofNi reaches 97.3％in a single stage,while the extractions of Mg and Li are nil and 2.29％,respectively.Further,after scrubbing with 300 mg/L NiSO4,the loaded organic solution is stripped using 0.2 mol/L H2SO4.The strip liquor containing 11.52 g/L Ni and only less than 6 mg/L Li is obtained.

tung oilcarboxylic acid extractantsynergistic solvent extractionnickelextraction mechanism

张立涵、曹佐英、张贵清、李青刚、王明玉、关文娟、巫圣喜、邓奇

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中南大学冶金与环境学院,长沙 410083

中南大学冶金分离科学与工程重点实验室,长沙 410083

湖南省林业科学院木本油料资源利用国家重点实验室,长沙 410018

湖南省林业科学院油脂分子构效湖南省重点实验室,长沙 410018

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桐油 羧酸萃取剂 协同溶剂萃取 镍 萃取机理

国家自然科学基金Joint Fund for Nuclear Technology Innovation Sponsored by the National Natural Science Foundation of ChinaChina National Nuclear Corporation

52104354U2067201

2024

10.1016/S1003-6326(24)66473-3

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(4)
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