Non-traditional methods of treating high-silicon ores containing rare elements

Chizhevskaya, S. V.; Чекмарев, А. М.; Klimenko, O. M.; Povetkina, M. V.; Sinegribova, O. A.; Cox, Michael T.

doi:10.1007/978-94-011-1214-7_13

Cited by 9 publications

(7 citation statements)

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“…The combination of mechanical activation and solvent leaching with TBP-HNO 3 was used to extract the rare earths and zirconium from eudialyte [17]. Eudialyte becomes more amorphous during mechanical activation and this strongly affects the tendency of metal ions to be leached from the ore.…”

Section: Recovery Of Metals From Complex Oresmentioning

confidence: 99%

“…During the past two decades Russian researchers have developed several processes for the recovery of valuable metals from refractory ores and ores rich in soluble silica (e.g., eudialyte) that are difficult to treat using conventional hydrometallurgical processes [17,19]. A common feature of these solvometallurgical processes is the combination of mechanical activation with solvent leaching.…”

Section: Recovery Of Metals From Complex Oresmentioning

confidence: 99%

“…In 1985, in his book on ion solvation, Marcus used the term ''solvometallurgy'' to describe the extension of hydrometallurgy to solvents other than water [15]. Russian researchers also applied the solvometallurgical methods to recover metals from complex silica-rich ores (e.g., eudialyte), urban waste, and pellets of nuclear fuel [16][17][18][19]. In recent years, there has been progress in the use of ionic liquids and deep-eutectic solvents in metallurgical processes, ranging from leaching, to solvent extraction, and the electrodeposition of metals [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Solvometallurgy: An Emerging Branch of Extractive Metallurgy

Binnemans

Jones

2017

J. Sustain. Metall.

217

187

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This position paper introduces the reader to the concept of solvometallurgy, the term used to describe the extraction of metals from ores, industrial process residues, production scrap, and urban waste using non-aqueous solutions. Here, non-aqueous is not used to imply anhydrous, but rather a low water content. The unit operations are as follows: solvent leaching; separation of the residue; purification of the leach solution by non-aqueous solvent extraction or non-aqueous ion exchange; and metal recovery by precipitation or electrolysis in non-aqueous electrolytes. Solvometallurgy is similar to hydrometallurgy in that both the branches of extractive metallurgy use lowtemperature processes, but with solvometallurgy, there is no discrete water phase. Both branches use organic or inorganic solvents (excluding water in the case of solvometallurgy). However, for solvometallurgical processes to be sustainable, they must be based on green solvents, which means that all toxic or environmentally harmful solvents must be avoided. Solvometallurgy is complementary to pyrometallurgy and hydrometallurgy, but this new approach offers several advantages. First, the consumption of water is very limited, and so the generation of wastewater can be avoided. Second, the leaching and solvent extraction can be combined to form a single step, resulting in more simplified process flow sheets. Third, solvent leaching is often more selective than leaching with acidic aqueous solutions, leading to reduced acid consumption and fewer purification steps. Fourth, solvometallurgy is useful for the treatment of ores rich in soluble silica (e.g., eudialyte) because no silica gel is formed. In short, solvometallurgy is in a position to help develop the near-zero-waste metallurgical processes, and with levels of energy consumption that are much lower than those with the high-temperature processes. The Technology Readiness Level (TRL) of this emerging branch of extractive metallurgy is still low (TRL = 3-4), which is a disadvantage for short-term implementation, but offers a great opportunity for further research, development, and innovation.

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Section: Recovery Of Metals From Complex Oresmentioning

confidence: 99%

Section: Recovery Of Metals From Complex Oresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Solvometallurgy: An Emerging Branch of Extractive Metallurgy

Binnemans

Jones

2017

J. Sustain. Metall.

217

187

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“…The resulting precipitate was dissolved in 25 mL of 4 M HNO 3 . Silicon compounds were precip itated with an aqueous solution of sodium methylsili conate by a reported procedure [13]. The gel like sili con containing precipitate was separated from the solution by centrifugation.…”

Section: Synthesis Of 5 (Diphenylphosphoryl)hexan 3 One (I)mentioning

confidence: 99%

“…This design makes it possible to obtain the concentration profiles of the components in the cas cade steps and to use these data for evaluating the effi ciency of extraction. In the first cycle, the initial aque ous phase comprised the solution resulting from sulfu ric acid digestion of eudialyte followed by removal of some components from the primary solution [13] and a 0.01 M solution of extractant I in chloroform served as the initial organic phase. In the second cycle, raffi nate of the first cycle served as the initial aqueous phase and a 0.05 M solution of extractant I in chloro form was used as the initial organic phase.…”

mentioning

confidence: 99%

A phosphorylated ketone, 5-(diphenylphosphoryl)hexan-3-one, as a new effective extractant for the recovery and separation of lanthanides in the eudialyte processing

et al. 2015

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Understanding the Complex Surface Interplay for Extraction: A Molecular Dynamics Study

Macchieraldo

Ingenmey

Kirchner

2020

Chemistry A European J

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By means of classical molecular dynamics simulation the interfacial properties of methanola nd n-dodecane, which are two potential candidate solvents for use in nonaqueous liquid-liquid extraction, were assessed. The question of how the interface changes dependingo nt he concentration of extractant(tri-n-butyl phosphate) and salt (LiCl) is addressed. Twod ifferent models to represent systems were used to evaluateh ow LiCl and tri-n-butyl phosphate affect mutual miscibility,a nd how the last-named behaves depending on the chemical environment. Tri-n-butylp hosphate increases the mutual solubility of the solvents, whereas LiClc ounteracts it. The extractant was found to be mostly adsorbed on the interface between the solvents, and therefore the structural features of the adsorption were investigated.A dsorption of tri-n-butyl phosphate changes depending on its concentration and the presence of LiCl. It exhibits ap referentialo rientation in which the butylc hains point at the n-dodecanep hase and the phosphate group points at the methanol phase. For high concentrations of tri-n-butyl phosphate, its molecular orientation is preserved by diffusion of the excess molecules into both the methanola nd ndodecane phases. However,L iCl hinders the diffusion into the methanolp hase, and thus increasest he concentration of tri-n-butyl phosphate at the interface and forces ar earrangement with subsequent loss of orientation.

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Non-traditional methods of treating high-silicon ores containing rare elements

Cited by 9 publications

References 1 publication

Solvometallurgy: An Emerging Branch of Extractive Metallurgy

Solvometallurgy: An Emerging Branch of Extractive Metallurgy

A phosphorylated ketone, 5-(diphenylphosphoryl)hexan-3-one, as a new effective extractant for the recovery and separation of lanthanides in the eudialyte processing

Understanding the Complex Surface Interplay for Extraction: A Molecular Dynamics Study

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