非平衡抽出による酢酸溶液中のアルミニウムからの希土類選択的分離
Linlin Chang1, Jian Li1, Dongyue Xie2
1School of Rare Earths, University of Science and Technology of China, Hefei, 230026, China; Ganjiang Innovation Institute of the Chinese Academy of Sciences, Ganzhou, 341000, China; Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths, Ganzhou, 341000, China.
Journal of environmental management
|February 25, 2026
まとめ
本研究では、非平衡抽出を用いた希土類元素(REE)とアルミニウムの効率的な分離法を紹介する。このプロセスは、鹸化なしで高い選択性と効率を達成し、湿式製錬用途に環境に優しい代替法を提供する。
科学分野:
- 湿式製錬
- 分離科学
- 希土類元素化学
背景:
- 従来の希土類元素(REE)とアルミニウム(Al(III))の分離は、しばしば鹸化を用いる溶媒抽出に依存しています。
- 鹸化法は分離係数が低く、大量の過塩湖水廃水を生成します。
研究 の 目的:
- 選択的かつ環境に優しいREE(III)とAl(III)分離プロセスの開発。
- 酢酸溶液中での非鹸化P507を用いた非平衡抽出の調査。
主な方法:
- 非鹸化P507を酢酸媒体中で用いた非平衡溶媒抽出。
- Al(III)に対するREE(III)の選択性を高めるための速度論的制御。
- 抽出条件の最適化とメカニズム研究(最大負荷、分光分析)。
主要な成果:
- 事前のAl(III)除去なしに、RE(III)をAl(III)に対して選択的に分離しました。
- La(III)の物質移動係数がAl(III)の15.77倍であることを実証しました。
- 分離係数(βLa/Al)102.8で、94.04%のLa(III)抽出効率を得ました。
結論:
- 提案された非平衡抽出プロセスは、REEとAlの効率的な非鹸化分離を提供します。
- このメカニズムは、カチオン交換と中性錯体抽出を含み、1:2:1のターナリー錯体を形成します。
- この方法は、湿式製錬用途に有望で環境に優しいアプローチを提示します。
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