Leaching and Selective Extraction of Indium and Tin from Zinc Flue Dust Using an Oxalic Acid-Based Deep Eutectic Solvent,ACS Sustainable Chemistry & Engineering

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Leaching and Selective Extraction of Indium and Tin from Zinc Flue Dust Using an Oxalic Acid-Based Deep Eutectic Solvent
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-01-25 00:00:00 , DOI: 10.1021/acssuschemeng.8b06331
Philipp Zürner ₁ , Gero Frisch ₁

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Deep eutectic solvents have previously been used as cost-effective and readily available alternatives to conventional ionic liquids. Due to their versatile complexation properties, they are potential lixiviants for selective metal processing. In this study, we investigate the leaching behavior of three choline chloride-based deep eutectic solvents to selectively separate indium and tin from an oxide flue dust material. Ethylene glycol, urea, and oxalic acid dihydrate were used as hydrogen bond donors in the eutectic mixtures. The highest leaching yields were observed in the oxalic acid system Oxaline. A two-step precipitation procedure was developed for the leachate solution to separate the target metals indium and tin from the main flue dust components, i.e., iron, zinc, lead, and copper. This ionometallurgical approach was compared to equivalent leaching experiments using aqueous oxalic acid solutions and other deep eutectic solvents.

中文翻译：

草酸基深共熔溶剂从锌粉尘中浸出和选择性萃取铟和锡

以前，深共晶溶剂已被用作传统离子液体的经济高效且容易获得的替代品。由于其通用的络合特性，它们是选择性金属加工的潜在助剂。在这项研究中，我们研究了三种基于氯化胆碱的深共熔溶剂的浸出行为，以选择性地从氧化烟道粉尘中分离出铟和锡。乙二醇，尿素和草酸二水合物用作低共熔混合物中的氢键供体。在草酸系统Oxaline中观察到最高的浸出率。针对浸出液开发了两步沉淀程序，以将目标金属铟和锡与主要烟道粉尘成分（即铁，锌，铅和铜）分离。

更新日期：2019-01-25

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