的选择性结晶分离(VI) 复合物从兰化物中分离.
Jun Wang1, Yanli Li1, Ruihong Yao1
1State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, P. R. China.
Inorganic chemistry
|January 13, 2025
概括
研究人员开发了一种新的N/O配体, (E) -NN.
科学领域:
- 核化学 核化学 核化学
- 材料科学 材料科学 材料科学
- 分离科学 分离科学
背景情况:
- 有限的资源对核能的发展构成了挑战.
- 兰化物的存在使得从使用过的核燃料中提取变得复杂.
- 选择性地将与化物分离,对于回收至关重要.
研究的目的:
- 开发一种用于选择性回收 (U(VI)) 超越类 (Ln(III/IV)) 的新型配体.
- 引入一种现场反应式提取技术,用于增强捕获.
- 为了研究连接体选择性的结构基础.
主要方法:
- 合成和应用 (E) -N'-(pyridin-2-ylmethylene) picolinohydrazide (PYPH) 连接物.
- 在加热下从BPTZ和DMF前体生成PYPH.
- 在酸性介质 (pH 3,0.1 M HNO3) 中进行液液提取实验.
- 协调复合体的单晶结构分析.
主要成果:
- PYPH对U的选择性比Ln的选择性高.
- 对于Ln (III/IV) 系统,分离因子超过10^3,对于U (VI) 系统则超过10^2.
- 实现了超过99%的纯度,有效地减轻了Ce (IV) 干扰.
- 结构分析揭示了负责选择性的二维平面协调复合体.
结论:
- 使用PYPH的现场反应提取技术对选择性回收有效.
- PYPH提供了增强的捕获能力,选择性和抗酸性.
- 这种方法提供了一个有前途的战略,用于从废核燃料中分离类和类.
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