Molybdenum recovery from acid leaching solution of copper smelting dust using solvent extraction

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2024-10-29 DOI:10.1016/j.jwpe.2024.106345

Jiawei Wu , Shan Qing , Yina Li , Mingyue Wang

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引用次数: 0

Abstract

The massive accumulation of dust produced in the copper smelting process will cause waste of resources and environmental pollution. The selective separation and recovery of valuable metals in copper smelting dust is particularly important. In this study, we proposed a process for extracting molybdenum from acid leaching solution of copper smelting dust with extractant N235. The effects of different process parameters on the extraction and stripping of molybdenum were studied. Under the optimum conditions, the single-stage extraction and stripping efficiency were 94.35 % and 97.77 %, respectively. The extraction efficiency of molybdenum was 99.26 % after three stages of countercurrent extraction. The loaded organic phase was scrubbed with 15 g/L sulfuric acid solution to remove impurities. The stripping efficiency of molybdenum was 99.66 % by three-stage countercurrent stripping with 8 mol/L NH₃∙H₂O. Furthermore, the organic phase still maintains a high extraction efficiency after regeneration cycle. Based on the slope method and FT-IR analysis, it is speculated that the extraction complex of molybdenum is [(R₃NH)₂·[Mo₂O₅(SO₄)₂]]. The extraction of molybdenum from acid leaching solution by N235 is an entropy increase and spontaneous endothermic reaction. The recovery of molybdenum from secondary resources reduces the demand for virgin molybdenum ore and improves the efficiency of resource utilization. This study provides an efficient, economical, and environmentally friendly method for industrial recovery of molybdenum.

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利用溶剂萃取从铜冶炼粉尘的酸浸出液中回收钼

铜冶炼过程中产生的大量粉尘会造成资源浪费和环境污染。选择性分离和回收铜冶炼粉尘中的有价金属尤为重要。在这项研究中，我们提出了一种用萃取剂 N235 从铜冶炼粉尘的酸浸液中萃取钼的工艺。研究了不同工艺参数对钼萃取和汽提的影响。在最佳条件下，单级萃取和汽提效率分别为 94.35 % 和 97.77 %。经过三段逆流萃取后，钼的萃取效率为 99.26%。负载的有机相用 15 g/L 的硫酸溶液洗涤，以去除杂质。用 8 mol/L NH3∙H2O 进行三级逆流萃取，钼的汽提效率为 99.66%。此外，有机相在再生循环后仍能保持较高的萃取效率。根据斜率法和 FT-IR 分析，推测钼的萃取复合物为[(R3NH)2-[Mo2O5(SO4)2]]。N235 从酸性浸出液中萃取钼是一种熵增加的自发内热反应。从二次资源中回收钼可减少对原生钼矿的需求，提高资源利用效率。这项研究为工业回收钼提供了一种高效、经济和环保的方法。

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies