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Separation of niobium and tantalum from Mozambican tantalite by

The extraction of both niobium and tantalum improved considerably with the introduction of sulphuric acid into the feed solution. For nearly complete extraction of tantalum and niobium with 2-octanol at 6 M and 9 M sulphuric acid concentrations, two and three equilibrium stages respectively are required. It was also shown that the extraction of ...

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Solubility of niobium (V) and tantalum (V) under mild alkaline

Alkaline solution appears as an alternative medium for the hydrometallurgy of niobium and tantalum since these two elements exhibit a good solubility in alkaline solutions [Deblonde et al., 2015a ...

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A review on extractive metallurgy of tantalum and niobium

[en] On-going technological developments, especially in the field of microelectronics and communication have reflected in concomitant increase in the demand for strategic metals such …

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Separation and isolation of tantalum and niobium from tantalite …

Tantalum was separated from the rest of the mineral matrix by solvent extraction using methyl isoamyl ketone.The analytical results indicated that 98.9(9)% Ta 2 O 5 was recovered from the organic portion while 101.6(3)% Nb 2 O 5 and the rest of the elements were recovered from the aqueous solution. Niobium was subsequently separated from the tantalite …

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Sulfuric acid leaching of Kab Amiri niobium–tantalum bearing …

Hydrometallurgy. Volume 64, Issue 3, June 2002, Pages 219-229. ... The niobium–tantalum raw material under study was selected from Kab Amiri. The ore was ground to −500 μm and physically treated with heavy liquids, as shown in Fig. 1. Grains of buff and black colors were separated from the heavy fractions. They were differentiated as the ...

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A Review of Niobium-Tantalum Separation in …

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 …

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Pyrometallurgical Approach in the Recovery of Niobium and Tantalum

The pyrometallurgical methods of the recovery of various critical metals have been established. Certain pyrometallurgical approaches for niobium (Nb) and tantalum (Ta) extraction have been studied and investigated by several researchers. For instance, the conventional reduction of Nb mineral or Nb2O5 to Nb metal has been conducted over the decades. Albeit, …

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Hydrometallurgical, pyrometallurgical and electrometallurgical

This review paper discusses the extraction processes of niobium and tantalum, encompassing hydrometallurgical, pyrometallurgical and electrometallurgical methods. The …

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Hydrometallurgical, pyrometallurgical and electrometallurgical

This review paper discusses the extraction processes of niobium and tantalum, encompassing hydrometallurgical, pyrometallurgical and electrometallurgical methods. The hydrometallurgical approach discussed includes ore preparation, leaching, solvent extraction, solid–liquid separation, fractional crystallisation and precipitation. The pyrometallurgical …

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Process development for the separation of niobium and tantalum …

Studies on separation of niobium and tantalum from fluoride medium using trioctyl amine have shown that it is possible to obtain high purity niobium and tantalum (98.88% pure niobium and 98.08% pure tantalum) from a hydrofluoric acid media, without the use of any other mineral acid during solvent extraction. ... Hydrometallurgy, Volume 201 ...

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A review on extractive metallurgy of tantalum and niobium

Certain pyrometallurgical approaches for niobium (Nb) and tantalum (Ta) extraction have been studied and investigated by several researchers. ... 2011, Solvent extraction technology for the separation and purification of niobium and tantalum: A review, Hydrometallurgy, 107 (1–2), pp. 1–12. doi: Jo ur n al Pr e- pr oo f 10.1016/j.hydromet ...

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A Review of Niobium-Tantalum Separation in …

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 …

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A Review of Niobium-Tantalum Separation in …

A Review of Niobium-Tantalum Separation in Hydrometallurgy Olushola S. Ayanda 1* and Folahan A. Adekola 2 1 Department of Chemistry, Faculty of Applied Sciences, Cape Peninsula University of

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Hydrometallurgical Separation of Niobium and Tantalum: A

The separation of tantalum and niobium after NH4F·HF flux dissolution was investigated using three different separation methods, namely selective precipitation, solvent …

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A Review of Niobium-Tantalum Separation in Hydrometallurgy

EXTRACTION AND SEPARATION OF NIOBIUM AND TANTALUM 3.1 Processes of Extraction and Separation After the breakdown treatment, the mixed oxides of tantalum Ta2O5 and niobium Nb2O5 are obtained. The first step in the processing is the reaction of the oxides with hydrofluoric acid [10]: Ta2O5 + 14 HF → 2 H2[TaF7] + 5 H2O Nb2O5 + 10 HF → 2 H2 ...

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Processing of the mineralized Black Mica for the recovery of …

The mineralogical studies on Black mica raw material revealed the presence of notable high radioactive minerals such as uranium minerals (Soddyite, Uranophane, Uranothorite, and Ishikawaite), niobium - tantalum minerals (Columbite and Plumbopyrochlore), and rare earth elements minerals (Allanite, Xenotime, and monazite).From mineralogical and chemical …

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(PDF) Green Extraction of Nb and Ta from Kenticha Ores

Like other economical metals, tantalum (Ta) and niobium (Nb) are broadly used in electronic and other high-tech industries.1‒4 TaNb concentrates are mainly composed of columbotabatlite (Fe,Mn) (Ta,Nb)2O6 and other classes of mineral. 1‒7 Ethiopia has world class tantalite deposits, which are found only in some countries of the world such as Australia, Brazil, Canada and …

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Separation of niobium and tantalum using continuous multistage counter

Niobium and tantalum have applications ranging from nuclear, steel, aerospace and manufacturing industries (Agulyansky, 2004; Mackay and Simandl, 2014).These metals occur in the Columbite-Tantalite ore which are dissolved in hydrofluoric acid solution and then extracted using solvent extraction (Mirji et al., 2016; Zhu and Cheng, 2011).The conventional processes …

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A novel method for the separation of niobium and titanium from …

Liquid/liquid extraction is a highly efficient technique used in hydrometallurgy to separate and purify valuable metal ions in complex liquor solutions (Shaikh and Kumar, 2017; Su et al., 2020a; Sun et al., 2018; Zhao et al., 2015). ... Process development for the separation of niobium and tantalum from fluoride medium using trioctyl amine and ...

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An investigation on hydrofluoric (HF) acid-free extraction for niobium

Tantalum, niobium, and their oxides are important precursor materials, essential for high-temperature alloys and electronic devices. The primary hydrometallurgical extraction technique to extract tantalum and niobium from minerals involves hydrofluoric acid (HF) digestion of the concentrates, followed by solvent extraction as an oxide separation and purification step.

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A Review of Niobium-Tantalum Separation in Hydrometallurgy

One of the simplest methods for the breakdown treatment of primary concentrates of niobium and tantalum, particularly pyrochlore and columbite-tantalite, is direct reduction with aluminum or …

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Tantalum (V) and niobium (V) extraction by octanol

2020, Hydrometallurgy. Show abstract. On-going technological developments, especially in the field of microelectronics and communication have reflected in concomitant increase in the demand for strategic metals such as tantalum (Ta) and niobium (Nb). The extraction of these two metals from ore deposits and secondary resources is based on the ...

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Review Solvent extraction technology for the separation and

Niobium and tantalum are located in the same group (VB) in the periodic table of the elements, and therefore they have very similar chemical properties, hence making it difficult to separate them from each other. ... Hydrometallurgy, 72 (3–4) (2004), pp. 259-267. Google Scholar. Hussaini et al., 2001. O.M.E. Hussaini, M.A. Mahdy, H. El.

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Green extraction of niobium and tantalum for Ethiopian …

(Ta) products using green technologies. The foremost source of niobium and tantalum is the columbite-tantalite mineral or "coltan". Since hydrometallurgical methods are most commonly used to recover these metals from raw materials, Solvent Extraction (SX) processes have been used for producing pure niobium and tantalum products.

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Factors and challenges in the recovery of niobium and tantalum …

Introduction. Niobium and tantalum primary minerals are naturally occurring complex oxide ores, majorly of low grade deposits with chemical content of mainly Nb 2 /Ta 2 O 5 and oxides of Fe, Mn, Sn, Ti and other metal oxides. Over the decades, researchers have extensively and consistently investigated the extraction and recovery of Nb and Ta from primary mineral …

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Solvent extraction technology for the separation and purification of

Niobium and tantalum are located in the same group (VB) in the periodic table of the elements, and therefore they have very similar chemical properties, hence making it difficult to separate them from each other. ... Hydrometallurgy, Volume 165, Part 2, 2016, pp. 345-350. Gauthier J.-P. Deblonde, …, Gérard Cote. Solubility of niobium(V) and ...

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A Review of Niobium-Tantalum Separation in …

Hydrometallurgy, 2012. Tantalite ore from Mozambique was digested using molten ammonium bifluoride (NH 4 HF 2) as an alternative to hydrofluoric acid. Niobium and tantalum were extracted from the water-leached filtrate using 1 …

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Hydrometallurgical Separation of Niobium and Tantalum: A

A mixture of pure Ta2O5 and Nb2O5 was dissolved using two different fluxes, namely NH4F·HF and Na2HPO4/NaH2PO4·H2O. 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 accompanied by 23(5)% niobium. A separation …

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Hydrometallurgical, pyrometallurgical and electrometallurgical

This review paper discusses the extraction processes of niobium and tantalum, encompassing hydrometallurgical, pyrometallurgical and electrometallurgical methods. ... et al. A review on extractive metallurgy of tantalum and niobium. Hydrometallurgy 2020; 198: 105496. Crossref. Web of Science. Google Scholar. 11. Chen and Lin KY ...

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Non-fluoride dissolution of tantalum and niobium oxides and their

Niobium and tantalum are conjugate in natural mineral deposits and are mainly present as metal oxides. The chemical similarities of the two oxides, such as their high resistance to chemical attack and their nearly identical atomic radii, complicate the separation of the two elements. ... Hydrometallurgy, 149 (2014), pp. 31-40. View PDF View ...

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