用于回收废旧锂离子电池中Co(Ⅱ)的2种新型螯合剂的制备及其性能  

Preparation and performance of two new chelants for recycling Co(Ⅱ) from spent Li-ion batteries

作　　者：湛雪辉[1] 周随安[1] 曹芬[1] 李侠[1] 李飞[1] 

机构地区：[1]长沙理工大学化学与生物工程学院,湖南长沙410076

出　　处：《中南大学学报（自然科学版）》2011年第10期2966-2970,共5页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50774016);湖南省科技攻关项目(2008FJ3009)

摘　　要：以对甲基苯硫酚为原料,通过硝化、还原、重氮化等一系列反应合成4-甲基-2-羟基硫酚(A)。考察重氮化过程中NaNO2的用量、硫酸浓度、反应温度以及水解时硫酸浓度对产率的影响。在最佳影响因素下得到最高产率71.2%。通过氯磺化、还原以及最佳反应条件合成含有邻羟基苯硫酚的螯合树脂(B)。使用傅里叶红外光谱表征4-甲基-2-羟基硫酚与螯合树脂。在废旧锂离子电池浸出液中进行分批实验考察4-甲基-2-羟基硫酚与螯合树脂的性能,并且使用HCl溶液提取所螯合的Co2+。研究结果表明:螯合树脂显示良好的可循环性。4-methyl-2-hydroxythiophenol（A） was synthesized by nitration,reduction and diazotization of p-thiophenol.The influence of dosage of NaNO2,concentration of sulfuric acid,temperature and concentration of H2SO4 in hydrolysis reaction on the yield of 4-methyl-2-hydroxythiophenol was studied.A high yield（71.2%） was achieved under the optimal reaction conditions.And a new chelating resin（B） containing o-hydroxythiophenol was synthesized through chlorosulfonation,reduction and the optimal reactions above.The FT-IR was used to identify the formation of 4-methyl-2-hydroxythiophenol and chelating resin.The adsorption performance of 4-methyl-2-hydroxythiophenol and chelating resin was processed in batch solution which was generated by leaching from LiCoO2,and finally Co2＋ was eluted from chelant with HCl solution.Chelating resin displays good recyclability.

关 键 词：废旧锂离子电池 钴 螯合树脂 回收 

分 类 号：TM912.9[电气工程—电力电子与电力传动]