开发和优化用于分离稀土元素的高性能提取色谱方法
1Rare Earth Technologies Inc., 12082 Champion Way, Cincinnati, Ohio 45241, USA.
Journal of chromatography. A
|June 30, 2024
概括
与TBP和Aliquat-336.6相比,二二甲基酸 (HDEHP) 为稀土元素 (REEs) 提供了优越的染色学分离. 优化的HDEHP提取在25分钟内实现了完整的REE系列分离.
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:
- 染色分离对于稀土元素 (REE) 分析至关重要.
- 常见的提取剂,如三酸 (TBP),二2-乙) 酸 (HDEHP) 和阿利卡特-336用于REE分离.
- 优化分离效率和速度对于实际应用至关重要.
研究的目的:
- 为了比较TBP,HDEHP和Aliquat-336在REEs染色分离方面的有效性.
- 为了优化基于HDEHP的提取色谱方法,以实现完整的REE系列分离.
- 研究温度和流量对分离效率的影响.
主要方法:
- 用TBP,HDEHP和Aliquat-336准备了柱子,使用矿物酸作为化剂.
- 对于每个提取剂,确定了保留因子和分离分辨率 (Rs).
- 使用HDEHP涂层的柱子来优化分离,使用阶段梯度化,变化温度和流速.
主要成果:
- 在HDEHP中,分离效率最高 (平均Rs = 2.76),其次是TBP (平均Rs = 1.52) 和Aliquat-336 (平均Rs = 1.42).
- 优化HDEHP提取与逐步梯度化在25分钟内实现了整个REE系列的完全分离.
- 较高的柱体温度和1.5毫升/分钟的流速改善了光的REE分离,板高度 (H) 从0.011到0.027毫米不等.
结论:
- 对于整个REE系列的染色分离,HDEHP是最有效的提取剂.
- 逐步梯度化,优化温度和流速显著提高了REE分离的效率和速度.
- 开发的HDEHP方法提供了快速和完整的REEs分离,有价值的分析和工业用途.
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