离子液体复合树脂的制备及其在镍电解液除锌中的应用
Preparation of Ionic Liquid Composite Resin and Its Application in Removing Zinc from Nickel Electrolyte
程少逸 1马玉天 1张娟 1席海龙 1孙渊君 1宗红星 1郭勇 2李亦婧2
作者信息
- 1. 镍钴共伴生资源开发与综合利用全国重点实验室,甘肃金昌 737100
- 2. 中国科学院兰州化学物理研究所,兰州 730000
- 折叠
摘要
针对镍电解液中杂质锌的选择性分离困难,制备了一种咪唑基离子液体复合树脂.对复合树脂吸附锌氯配合离子的平衡、动力学和热力学特性、吸附选择性以及pH值和温度对锌吸附率的影响进行研究.结果表明,吸附符合Freundlich等温模型,吸附过程符合准二级动力学模型,吸附过程为放热过程温度越低时吸附率越高,树脂对锌表现出了优异的选择性,低pH值的溶液条件更有利于树脂吸附锌.离子液体复合树脂对锌的饱和吸附量可达62.83 mg/L.使用该树脂处理实际镍电解液中的杂质锌,移除率最高可达到97.28％,树脂经重复再生6次后仍然能达到85％以上的锌移除率.
Abstract
An imidazolyl ionic liquid composite resin was prepared regarding the difficulty of selective separation of impurity zinc from nickel electrolyte.The equilibrium,kinetic and thermodynamic properties of zinc chloride complex ion adsorbed by the composite resin and the effects of pH and temperature on the adsorption rate of zinc were studied.The results show that the adsorption conforms to the Freundlich isothermal model,and the adsorption process conforms to the quasi-second-order kinetic model.The lower the temperature of the exothermic process,the higher the adsorption rate,and the low pH solution is more conducive to the adsorption of zinc by the resin.The saturated adsorption capacity of the ionic liquid composite resin for zinc can reach 62.83 mg/L.When the resin is used to treat the impurity zinc in the actual nickel electrolyte,the maximum removal rate can reach 97.28％,and the resin can still reach more than 85％zinc removal rate after repeated regeneration for 6 times.
关键词
离子液体/镍电解液/选择性吸附锌Key words
ionic liquid/nickel electrolyte/selective adsorption of zinc引用本文复制引用
出版年
2024
NETL
NSTL
万方数据