使用有机磷萃取剂作为疏水性深共晶溶剂(HDES)的成分处理磷酸铁锂电池废液

IF 4.8 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Arina V. Kozhevnikova, Dmitriy V. Lobovich, Nikita A. Milevskii, Inna V. Zinov'eva, Yulia A. Zakhodyaeva, Andrey A. Voshkin
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引用次数: 0

摘要

由于全球有毒物质排放标准不断收紧,用于管理工业废弃物的水冶工艺备受关注。在这些工艺中,使用非挥发性疏水性深共晶溶剂(HDES)已成为优化萃取工艺的一种有前途的方法。在这项研究中,我们研究了磷酸三丁酯(TBP)和二(2-乙基己基)磷酸(D2EHPA)的 HDES,用于萃取和分离磷酸锂铁电池中的元素,包括锂、铝、铁和铜。对 HDES 的物理特性(如密度、粘度和折射率)进行了表征,并使用红外光谱分析了其成分之间的相互作用。考虑到以 D2EHPA 和 TBP 为代表的不同类别萃取剂,在盐酸浓度(1-10 mol/L)范围内对目标金属的萃取效率进行了评估。确定了萃取剂再生和生产单个金属离子溶液的最佳再萃取(剥离)条件。结果表明,在大多数酸度水平下,铁离子的萃取效率超过 99%,而铝离子在 pH 值为 1.4 时的萃取效率与此类似。相比之下,在较低的 pH 值下,铜离子的萃取率有限(<5%),但在 pH 值为 1.9 及以上时,萃取率提高到 50%。根据这些发现,我们提出了一种基于溶液酸度逐渐降低的铝离子、铜离子、铁离子和锂离子混合物的顺序萃取方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The use of organophosphorus extractants as a component of hydrophobic deep eutectic solvents (HDES) for the processing of spent lithium‑iron phosphate batteries

The use of organophosphorus extractants as a component of hydrophobic deep eutectic solvents (HDES) for the processing of spent lithium‑iron phosphate batteries

Hydrometallurgical processes for managing industrial waste have attracted significant attention due to tightening global standards on toxic emissions. Among these processes, the use of non-volatile hydrophobic deep eutectic solvents (HDESs) has emerged as a promising approach to optimising extraction processes. In this study, HDESs incorporating tributyl phosphate (TBP) and di(2-ethylhexyl)phosphoric acid (D2EHPA) were investigated in the context of the extraction and separation of elements found in lithium‑iron phosphate batteries, including lithium, aluminium, iron and copper. The physical properties of the HDESs, such as density, viscosity and refractive index, were characterized and the interactions between their components were analysed using infrared spectroscopy. Considering the different classes of extractants represented by D2EHPA and TBP, extraction efficiency for target metals was evaluated across a range of hydrochloric acid concentrations (1–10 mol/L). Optimal conditions for re-extraction (stripping) were identified for extractant regeneration and the production of individual metal ion solutions. Results demonstrated that Fe3+ ions could be extracted with an efficiency exceeding 99% across the majority of acidity levels, while Al3+ ions exhibited similar efficiency from a pH of 1.4. In contrast, Cu2+ ions showed limited extraction (<5%) at lower pH values but the level of extraction increased to 50% at pH 1.9 and above. Leveraging these findings, a sequential extraction scheme is proposed for Al3+, Cu2+, Fe3+ and Li+ from their mixture, based on a gradual reduction in solution acidity.

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来源期刊
Hydrometallurgy
Hydrometallurgy 工程技术-冶金工程
CiteScore
9.50
自引率
6.40%
发文量
144
审稿时长
3.4 months
期刊介绍: Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties. Topics covered include: leaching of metal values by chemical reagents or bacterial action at ambient or elevated pressures and temperatures; separation of solids from leach liquors; removal of impurities and recovery of metal values by precipitation, ion exchange, solvent extraction, gaseous reduction, cementation, electro-winning and electro-refining; pre-treatment of ores by roasting or chemical treatments such as halogenation or reduction; recycling of reagents and treatment of effluents.
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