O. Ayanda and F. Adekola, "A Review of Niobium-Tantalum Separation in Hydrometallurgy," Journal of Minerals and Materials Characterization and Engineering, Vol. 10 No. 3, 2011, pp. 245-256. doi: 10.4236/jmmce.2011.103016. Cited by [1] Toward Redox-and Photoredox-Based Niobium/Tantalum Separations ...
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In this paper, a review of the many technologies for niobium production will be presented starting at the mine, through techniques of niobium ore beneficiation and refining, technologies to ...
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A Review on the Separation of Niobium and Tantalum by Solvent Extraction Thi Hong Nguyen Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University, Jeollanamdo, Korea;College of Natural Sciences, Can Tho University, Can Tho City, Viet Nam View further author information
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Such difference between the formation of H 2 TaF 7 and H 2 NbOF 5 is responsible for the of Nb(V) and Ta(V). Furthermore, low-charge complexes of Nb and Ta, as TaF 6 and NbF 6 -, are readily ...
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A mixture of pure Ta 2 O 5 and Nb 2 O 5 was dissolved using two different fluxes, namely NH 4 F·HF and Na 2 HPO 4 /NaH 2 PO 4 ·H 2 O. Selective precipitation and ion exchange were used as separation techniques. Selective precipitation using p-phenylediamine in a fluoride matrix resulted in the isolation of 73(3)% tantalum …
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Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited.
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All these studies focused more on the separation of tantalum and niobium from acidic solutions, with neither discussing alkaline-based leach options nor the upstream and downstream operations accompanying Ta and Nb hydrometallurgy. The present review aims to fulfil the identified missing gaps and to contribute towards the lack of …
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O. Ayanda and F. Adekola, "A Review of Niobium-Tantalum Separation in Hydrometallurgy," Journal of Minerals and Materials Characterization and Engineering, Vol. 10 No. 3, 2011, pp. 245-256. doi: 10.4236/jmmce.2011.103016. Conflicts of Interest. The authors declare no conflicts of interest. ...
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Niobium and tantalum are chemically similar and are associated with each other in nature which makes it very difficult to separate. For many years, the separation of tantalum from niobium involved the fractional crystallization of potassium heptafluorotantalate away from potassium oxypentafluoroniobate monohydrate, this …
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Titanium is the ninth most abundant element in the earth's crust and the fourth most abundant element (Knittel 1983; Minkler and Baroch 1981).Its elemental abundance is about five times less than iron and 100 times greater than copper, yet for structural applications titanium's annual use is 200 times less than copper and 2000 times less …
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A detailed review of the various processes involved in the breakdown treatment of niobium and tantalum primary sources, …
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A Review of Niobium-Tantalum Separation in Hydrometallurgy Olushola S. Ayanda1* and Folahan A. Adekola2 1Department of Chemistry, Faculty of Applied Sciences, Cape Peninsula University of Technology, P.O. Box 652, Cape Town, South Africa. 2Department of Chemistry, University of Ilorin, P.M.B 1515, Ilorin, Nigeria.
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DOI: 10.4236/JMMCE.2011.103016 Corpus ID: 7541160; A Review of Niobium-Tantalum Separation in Hydrometallurgy @article{Ayanda2011ARO, title={A Review of Niobium-Tantalum Separation in Hydrometallurgy}, author={Olushola S. Ayanda and F. A. Adekola}, journal={Journal of Minerals and Materials Characterization and Engineering}, …
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Niobium is a rare, soft, grey and ductile transition metal with the symbol Nb. It was discovered by Charles Hatchett, an English chemist (1765-1847), in 1801 [1].
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Hydrometallurgy. Volume 201, May 2021, 105578. ... The present study provides a thorough review of technologies of Li production from such industrial sources, as spodumene, lepidolite, petalite, and mica. ... Due to the geochemistry of the formation of these ores, they contain minerals of tantalum, niobium, tin, aluminum, cesium, …
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In this paper, solvent extraction technology for the separation and purification of niobium and tantalum has been extensively reviewed. Although a variety of solvents have been investigated for niobium and tantalum solvent extraction, only four have been commercially used in the production of niobium and tantalum from their raw materials. These are …
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An International Journal devoted to all aspects of the Aqueous Processing of Metals. 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 …
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1. Introduction. Magnesium is an alkaline earth metal, with the symbol Mg and atomic number 12. Its most common oxidation state is 2+. It is the third most abundant element in seawater and the eighth most abundant element in the Earth's crust, representing approximately 2.1% of its composition (Kane et al. 2016; Harraz 2017; …
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A detailed review of the various processes involved in the breakdown treatment of niobium and tantalum primary sources, extraction and separation and newer processes of extraction as well as the various technique involved were discussed. Keyword: Niobium, Tantalum, Columbite, Tantalite, Solvent extractant and Solvent extraction. 1. INTRODUCTION
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The article covers the hydrometallurgical methods for leaching and recovery of tantalum and niobium from ores and secondary resources. It discusses the …
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Process applications and challenges in mineral beneficiation and recovery of niobium from ore deposits – A review
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With the rapid development of high-strength low-alloy (HSLA) steel, Nb as an important microalloying element has received more and more attention in recent years. The application and behavior of Nb in HSLA steel, including microstructures optimization, refining grain size, and precipitation behavior of Nb-containing phases, were reviewed. …
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Processing of the mineralized Black Mica for the recovery of uranium, rare earth elements, niobium, and tantalum. Hydrometallurgy, Volume 197, 2020, Article 105474 ... Mohamed E. Ibrahim, …, Hend M. Salem. A review of hydrometallurgy techniques for the removal of impurities from metallurgical-grade silicon. …
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DOI: 10.1016/j.hydromet.2023.106219 Corpus ID: 264069975; Corrigendum to "A review on extractive metallurgy of tantalum and niobium" [Hydrometallurgy 198 (2020) 105496] @article{Shikika2024CorrigendumT, title={Corrigendum to "A review on extractive metallurgy of tantalum and niobium" [Hydrometallurgy 198 (2020) 105496]}, …
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A single solvent extraction step using methyl-isobutyl ketone at a 4 M H 2 SO 4 yielded excellent Ta and Nb separation in the fluoride solution with 80% of the Ta …
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A simple and reliable method for the determination of percentage level niobium (3.5-8 %) in highly refractive gadolinium zirconate (Gd 2 Zr 2 O 7) doped with …
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Green extraction of niobium and tantalum for Ethiopian kenticha ores by hydrometallurgy process: a review. Like other economical metals, tantalum (Ta) and …
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DOI: 10.15406/MOJMM.2018.1.00015 Corpus ID: 54034068; Green extraction of niobium and tantalum for Ethiopian kenticha ores by hydrometallurgy process: a review @inproceedings{Gebreyohannes2018GreenEO, title={Green extraction of niobium and tantalum for Ethiopian kenticha ores by hydrometallurgy process: a …
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Properties and Applications of Niobium: Introduction. Historical: Discovery, Early Developments, Recent Trends. Properties: Physical Properties, Chemical Properties ...
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A detailed review of the various processes involved in the breakdown treatment of niobium and tantalum primary sources, extraction and separation and …
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