论文部分内容阅读
本文论述了硝酸中溶剂萃取铌的行为。试验过的萃取剂包括TBP、HDBP、H_2MBP辐照的TBP、HDEHP、TTA以及7402季铵盐等。文章较详细地叙述了钼和锆对溶萃取铌的特殊影响及辐照的TBP萃取铌的行为。同时提到水相中存在氟和铀对萃取铌的影响。实验观察到界面污物与D_(Nb)无直接关系,但对~(94)Nb有吸附。还讨论了可萃取铌的状态和萃取机理,以及~(95)Nb进入有机相的原因。最后,还就提高对~(95)Nb的去污系数提出了建议。
This article discusses the behavior of niobium in solvent extraction of nitric acid. Extractants tested include TBP, HDBP, H 2 MBP-irradiated TBP, HDEHP, TTA, and 7402 quaternary ammonium salts. The article describes in more detail the special effects of molybdenum and zirconium on the dissolution of niobium and the behavior of irradiated niobium by TBP. Mention was also made of the effect of fluoride and uranium on the extraction of niobium in the aqueous phase. It is observed experimentally that there is no direct relationship between interface fouling and D_ (Nb) but adsorption on ~ (94) Nb. The state and extraction mechanism of extractable niobium and the reason why Nb (95) enters the organic phase are also discussed. Finally, suggestions are also made to improve the decontamination factor for ~ (95) Nb.