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文章报导了苏丹I(1-苯基偶氮-2-萘酚)-中性配位体协同萃锂过程中的同位素分离效应。不同协萃剂呈现不同的分离效应,其中苏丹I-TOPO-二甲苯体系的α达1.009±0.001,有机相富集重同位素~7Li。螯合剂,协萃剂和稀释剂对同位素分离效应的贡献作了讨论。实验结果表明螯合剂结构起主要作用,协萃剂结构亦有明显效应,而稀释剂则关系不大。此类体系的萃取和交换平衡速度很快,属于扩散控制的萃取体系。
The article reports the isotope separation effects of Sudan I (1-phenylazo-2-naphthol) - neutral ligands in coordination with lithium extraction. Different co-extracting agents showed different separation effects, in which the α in the Sudan I-TOPO-xylene system was 1.009 ± 0.001, and the organic phase was rich in heavy isotopes ~ 7Li. The contribution of chelating agents, co-solvents and diluents to isotope separation is discussed. The experimental results show that the structure of the chelating agent plays a major role, and the structure of the co-facilitator also has obvious effect, while the diluent does not matter much. The extraction and exchange equilibrium of such systems is very fast and belongs to a diffusion-controlled extraction system.