【摘要】 本工作研究了二甲庚基乙酰胺(N₅₀₃)自盐酸溶液中萃取铟的性能,得出其萃取能力随着酸度的增加而增加。 经斜率法和化学分析法确定,N₅₀₃自盐酸溶液中萃取铟的反应为: In_a³⁺+H_a⁺+4Cl_a⁼+nN₅₀₃（O）?HInCl₄·nN₅₀₃（O）萃合物中的溶剂化数n随酸度而变化。IR和NMR研究证明,铟是以HInCl₄形式被N₅₀₃萃入有机相的。在盐酸体系中（HCl<2N）,N₅₀₃对镓、铟、铊的萃取顺序为: Tl（Ⅲ）>Ga（Ⅲ）>In（Ⅲ）更多还原

【Abstract】 The extraction behaviour of indium with dimethylheptyl acetamide from hydroch-loric acid medium has been studied. The extractability is found to increase withthe concentration of HCl. It is confirmed by an application of the slope method andchemical analysis that the extraction of In with N₅₀₃ from hydrochloric acid solutioncan be represented as follows: In_a³⁺+_a⁺4Cl_a^-+nN(₅₀₃（o）)→←HInCl4·nN₍（503（o）） The solvation number n of the extracted species varies with the concentration ofhydrochloric acid. IR and NMR data show that the indium is extracted in the form ofHInCl₄ into the organic phase of N₅₀₃. Under the condition of [HCl]<2N the extract-ability of galliun, Indium and thallium with N₅₀₃ was found to be in the followingorder: Tl（Ⅲ）>Ga（Ⅲ）>In（Ⅲ）更多还原