缩放高速逆流色谱用于准备性净化:洞察力和挑战
Alexander B Weberg1, Mateusz Dembowski2, Quintin K Blad2
1Chemistry - Nuclear and Radiochemistry (C-NR), Los Alamos National Laboratory, Mail Stop J-514, Los Alamos NM 87545, USA.
Journal of chromatography. A
|June 9, 2024
概括
这项研究介绍了一种使用高速逆流色谱 (HSCCC) 来分离稀土元素 (REE) 的新方法. 该技术通过利用微妙的离子半径差异,成功地在多毫克尺度上净化新 (Nd).
科学领域:
- 分析化学 分析化学
- 分离科学 分离科学
- 材料科学 材料科学 材料科学
背景情况:
- 对于可再生能源和高性能磁铁等先进技术来说,高效地分离稀土元素 (REEs) 是至关重要的.
- 可再生能源的相似化学特性,特别是它们的一致的+3氧化状态,对选择性分离提出了重大挑战.
- 现有的分离方法往往在生产高纯度的REEs的可扩展性和效率方面扎.
研究的目的:
- 开发和演示一种用于净化多毫克尺度上的新 (Nd) 的新方法.
- 使用高速反流色谱 (HSCCC) 进行高效的REE分离.
- 为了应对扩大REE分离过程的挑战.
主要方法:
- 使用高速反流色谱 (HSCCC) 进行REE分离.
- 使用了注入二-2-乙烯) 酸 (HDEHP) 的静止阶段.
- 在邻近的REEs之间利用离子半径的微妙差异来调整稀释酸中的化率.
主要成果:
- 获得了La/Ce/Nd/Sm分离,比HSCCC之前报告的金属负载 (15毫克) 高得多,RNd/REE>>0.85.
- 在较低的金属负载 (0.3毫克) 上成功执行了 Pr/Nd 分离,达到 0.75 到 0.83 的 RNd/Pr 值.
- 证明了在多毫克尺度上净化的可行性.
结论:
- 开发的HSCCC方法为高效大规模净化和其他REEs提供了一个有希望的方法.
- 该技术有效地利用离子半径的微妙差异进行选择性分离.
- 讨论了HSCCC扩大工业REE分离的挑战和考虑.
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