Selective Separation of Metal Ions via Bipolar Membrane Electrodialysis Coupled with Chelation

双极膜电渗析结合螯合选择性分离金属离子

• 批准号: 24656549
• 负责人: IIZUKA Atsushi
• 金额: $ 2.41万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24656549/
• 关键词: リチウムイオン電池; 選択的分離; キレート剤; バイポーラ膜; 電気透析

A new type of process for separating metals in solution is proposed, and applied to a mixed solution of lithium and cobalt, as in the recycling of waste lithium-ion batteries. When a chelating agent, ethylenediaminetetraacetic acid (EDTA), was added to a mixed solution of lithium ions and cobalt ions, almost all the cobalt ions were chelated by EDTA to form anions, whereas lithium ions were hardly chelated, at pH > 4. Electrodialysis of the feed solution was conducted using a three-cell-type electrodialysis system, with a unit consisting of two ion-exchange membranes and a bipolar membrane. Lithium was transported to the lithium recovery cell and cobalt was transported to the cobalt recovery cell, using an applied electric field. The selectivity for each metal in the recovery cell was about 99%. The separation system was also applied to Li-Co-Mn and In-Al systems, and its separation performance was studied.e

提出了一种分离溶液中金属的新工艺，并将其应用于锂钴混合溶液中，用于废旧锂离子电池的回收。在锂离子和钴离子的混合溶液中加入螯合剂乙二胺四乙酸（EDTA），在pH值为bbbb4时，几乎所有钴离子都被EDTA螯合形成阴离子，而锂离子几乎没有被螯合。采用三细胞式电渗析系统对进料液进行电渗析，该系统由两个离子交换膜和一个双极膜组成。利用外加电场将锂输送到锂回收电池中，将钴输送到钴回收电池中。在回收池中，每种金属的选择性约为99%。将该分离系统应用于Li-Co-Mn和In-Al体系，并对其分离性能进行了研究

项目成果

Separation of lithium and cobalt from waste lithium-ion batteries via bipolar membrane electrodialysis coupled with chelation

• DOI: 10.1016/j.seppur.2013.04.014
• 发表时间: 2013-07-24
• 期刊: SEPARATION AND PURIFICATION TECHNOLOGY
• 影响因子: 8.6
• 作者: Iizuka, Atsushi;Yamashita, Yasunobu;Yanagisawa, Yukio
• 通讯作者: Yanagisawa, Yukio