论文部分内容阅读
文章讨论了苏丹I-中性配位体协萃体系萃取分离锂同位素中螯合剂和协萃剂的结构效应。为了获得高的同位素分离效应,螯合剂必须是弱酸性的(PK_α>11),具有强的分子内氢键及易于形成六元螯合环。协萃剂结构不仅要求无空间位阻,而且具有强的配位基。α随配位基的碱性增大而相应提高。萃取络合物中螯合环的增多亦有利于体系α的提高。此外本文还讨论了一些萃取体系的同位素富集方向和萃锂体系用于分离同位素的前景。
In this paper, the structural effects of chelating agents and co-extracting agents in the extraction and separation of lithium isotopes from sudan I-neutral ligand extraction system are discussed. In order to achieve high isotopic separation, the chelating agent must be weakly acidic (PK_α> 11), have strong intramolecular hydrogen bonds and easily form six-membered chelating rings. Synergist structure not only requires no steric hindrance, but also has a strong ligand. α increases with the alkalinity of the ligand. The increase of chelating rings in the extracted complexes is also beneficial to the increase of the system α. In addition, the paper also discussed the isotope enrichment direction of some extraction systems and the prospect of lithium extraction system for the separation of isotopes.