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萃取色层法被称为第二代萃取体系,相对于液-液萃取选择性分离效果更好,萃取剂溶解损失小,被应用于超高纯稀土的制备。萃取色层法的关键是萃淋树脂,决定萃淋树脂性能的关键因素是萃取剂/萃取官能团。按照萃取剂与支撑基底的作用方式不同,萃淋树脂可分为两类:一类是萃取剂通过物理作用负载在支撑物基底上,另一类则是具有萃取作用的官能团通过化学键悬挂在支撑基底上。以萃取剂/萃取官能团为主要切入点,综述了近十年来萃淋树脂的研究进展,阐述了萃淋树脂的制备方法,负载不同萃取剂/悬挂不同萃取官能团的萃淋树脂对RE3+的萃取行为、机制、饱和萃取容量及分离性能等。
Extraction chromatography is called the second generation extraction system, which has better separation selectivity than liquid-liquid extraction and little loss of extractant. It is used in the preparation of ultra-high purity rare earth. The key of extraction chromatography is extraction resin, the key factor that determines the performance of extraction resin is extraction solvent / extraction functional group. Depending on the mode of action of the extractant and the support substrate, the extractant resins can be divided into two categories: one is that the extractant is physically supported on the support substrate, and the other is that the functional group with the extraction function is suspended by chemical bonds Substrate. The extraction and extraction of functional groups as the main entry point, reviewed the research progress of extraction-leaching resin in recent ten years, and described the preparation methods of extraction-leaching resin, the extraction behavior of RE3 + extracted with different extractants / suspension extraction functional groups , Mechanism, saturation extraction capacity and separation performance.