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本文研究了 Tl(Ⅲ)和 Pb(Ⅱ)、Cd(Ⅱ)、Bi(Ⅲ)、Se(Ⅳ)、Te(Ⅵ)单独存在时和 Tl(Ⅲ)与这些常见的杂质元素分别共存时,用N503的二乙苯溶液从不同浓度的盐酸水溶液中的萃取。根据它们在盐酸水溶液中形成各种络阴离子的分布,讨论了它们在用 N503萃取时的行为.所得结果说明:用 N503从盐酸水溶液中萃取铊时,可以有效地将铊与其他元素分离。铊的存在对铋的萃取有显著的抑制作用,而对铅却不明显。增加盐酸浓度亦难于进一步提高铊铅的分离效果。
In the presence of Tl (Ⅲ) and Pb (Ⅱ), Cd (Ⅱ), Bi (Ⅲ), Se (Ⅳ) and Te (Ⅵ) alone and Tl (Ⅲ) coexist with these common impurity elements, Extraction from aqueous solutions of different concentrations of hydrochloric acid with N503 diethylbenzene solution. According to the distribution of their various anions in aqueous hydrochloric acid solution, their behavior in extraction with N503 is discussed.The results show that when thallium is extracted from aqueous hydrochloric acid by N503, thallium can be effectively separated from other elements. The presence of thallium has a significant inhibitory effect on bismuth extraction, but not obvious for lead. Increasing the concentration of hydrochloric acid is also difficult to further improve the separation effect of lead and thallium.