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  

Selective extraction of nickel from acid leach solution of spent lithium-ion batteries using synergistic solvent extraction system consisting of TFCA-4PC

作　　者：张立涵 曹佐英 张贵清 李青刚 王明玉 关文娟 巫圣喜 邓奇 Li-han ZHANG;Zuo-ying CAO;Gui-qing ZHANG;Qing-gang LI;Ming-yu WANG;Wen-juan GUAN;Sheng-xi WU;Qi DENG(School of Metallurgy and Environment,Central South University,Changsha 410083,China;Key Laboratory of Metallurgical Separation Science and Engineering in Nonferrous Industry,Central South University,Changsha 410083,China;State Key Laboratory of Utilization of Woody Oil Resource,Hunan Academy of Forestry,Changsha 410018,China;Hunan Provincial Key Laboratory of Oils and Fats Molecular Structure and Function,Hunan Academy of Forestry,Changsha 410018,China)

机构地区：[1]中南大学冶金与环境学院,长沙410083 [2]中南大学冶金分离科学与工程重点实验室,长沙410083 [3]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 [4]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

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第4期1311-1320,共10页中国有色金属学报（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(No.52104354);the Joint Fund for Nuclear Technology Innovation Sponsored by the National Natural Science Foundation of China and the China National Nuclear Corporation(No.U2067201)。

摘　　要：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300mg/LNiSO_(4)洗涤后采用0.2 mol/L H_(2)SO_(4)反萃,获得的反萃液中含有11.52 g/L的Ni和<6 mg/L的Li。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 of Ni 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 NiSO_(4),the loaded organic solution is stripped using 0.2 mol/L H_(2)SO_(4).The strip liquor containing 11.52 g/L Ni and only less than 6 mg/L Li is obtained.

关 键 词：桐油 羧酸萃取剂 协同溶剂萃取 镍 萃取机理 

分 类 号：X705[环境科学与工程—环境工程] TF815[冶金工程—有色金属冶金]