中性水条件下用功能化EDTA螯合剂选择性沉淀分离镧系元素

IF 17.6 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Angewandte Chemie International Edition Pub Date : 2026-10-31 DOI:10.1002/anie.6458807

Jiajun Qiu, Leo K. B. Tam, Jean‐Claude G. Bünzli, Ka‐Leung Wong

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引用次数: 0

摘要

在这项研究中，我们报告了一种基于沉淀的策略，利用功能化乙二胺四乙酸（EDTA）螯合剂从中性水溶液中的永磁电子废物中回收和精炼钕（Nd）。在EDTA骨架上引入疏水取代基carbostyril 124，生成EDTA - cs124，其显示出随后的镧系配合物的溶解度分布，能够区分较轻和较重的镧系元素。较轻的镧系化合物的析出速度明显快于较重的镧系化合物，这使得从废弃硬盘驱动器（HDD）磁体中提取的Nd/Dy/Tb混合物中有效分离Nd成为可能。通过重复沉淀，可得到纯度为99.3%、回收率为77%的再生Nd。使用可回收的EDTA - cs124提供了一种操作简单且无有机溶剂的镧系元素分离方法。

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Lanthanide Separation via Selective Precipitation Under Neutral Aqueous Conditions With a Functionalized EDTA Chelator

In this study, we report a precipitation‐based strategy for recycling and refining neodymium (Nd) from permanent magnet e‐waste in neutral aqueous solution using a functionalized ethylenediaminetetraacetic acid (EDTA) chelator. A hydrophobic substituent, carbostyril 124, was introduced onto the EDTA framework to yield EDTA‐cs124, which exhibited a solubility profile of the ensuing lanthanide complexes capable of differentiating the lighter and heavier lanthanides. The lighter lanthanide complexes precipitated markedly faster than the heavier ones, enabling efficient separation of Nd from a Nd/Dy/Tb mixture derived from waste hard disk drive (HDD) magnets. The recycled Nd could be refined by repeated precipitations to afford 99.3% Nd purity and 77% recovery yield. Using recyclable EDTA‐cs124 provides an operationally simple and organic‐solvent‐free approach for lanthanide separation.

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来源期刊

Angewandte Chemie International Edition 化学-化学综合

CiteScore

26.60

自引率

6.60%

发文量

3549

审稿时长

1.5 months

期刊介绍： Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.