Indium and germanium are rare elements and contribute to supporting materials for contemporary high technology new materials. Research and development of efficient separation and extraction of indium and germanium have important practical significance. A new process of “one step extraction and stepwise stripping” is proposed in this work to coextract indium and germanium with D2EHPA-YW100 synergistic system of Di(2-ethylhexyl) phosphoric acid (D2EHPA) and C7–9 hydroxamic acid (YW100) denoted by D2EHPA-YW100. In the coextraction process, 98.9 % of indium and 99.9 % germanium were extracted utilizing an organic phase consisting of YW100 (1.4 %), D2EHPA (15 %) and sulfonated kerosene (83.6 %). During the two-step stripping process, 99.9 % of indium was selectively stripped from the loaded organic phase in step-1 using 4 M HCl. In step-2, 99.5 % of germanium was stripped using a 1 M NH4F solution. This separation resulted the enrichment of germanium concentration by 6–7 fold and indium concentration by 19 fold. This method has four advantages: (i) simplifies the separation process, (ii) reduces equipment investment by nearly 50 %, (iii) minimizes extraction agent loss, and (iv) reduces management and labor costs.

中文翻译：

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使用 D2EHPA-YW100 协同系统以及 HCl 和 NH4F 选择性剥离，从锌加工废浸液中经济高效地选择性分离铟和锗


铟和锗是稀有元素，有助于当代高科技新材料的支撑材料。铟、锗的高效分离萃取的研究开发具有重要的现实意义。本工作提出了一种“一步提取和逐步剥离”的新工艺，将铟和锗与D2EHPA-YW100表示的二（2-乙基己基）磷酸（D2EHPA）和C7-9异羟肟酸（YW100）的协同体系共提取。在共萃取过程中，利用由 YW100 （1.4%）、D2EHPA （15%） 和磺化煤油 （83.6%） 组成的有机相萃取 98.9% 的铟和 99.9% 的锗。在两步剥离过程中，使用 4 M HCl 从步骤 1 中选择性剥离 99.9% 的铟。在步骤 2 中，使用 1 M NH4F 溶液剥离 99.5% 的锗。这种分离导致锗浓度富集了 6-7 倍，铟浓度富集了 19 倍。该方法有四个优点：（i） 简化了分离过程，（ii） 将设备投资减少了近 50%，（iii） 最大限度地减少了萃取剂的损失，以及 （iv） 降低了管理和人工成本。