Extraction of Gallium(III) from Hydrochloric Acid Solutions by Trioctylammonium-based Mixed Ionic Liquids

Katsuta, Shoichi; Okai, Miho; Yoshimoto, Yuki; Kudo, Yoshihisa

doi:10.2116/analsci.28.1009

Cited by 20 publications

(7 citation statements)

References 15 publications

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“…The representative examples are the use of protic ionic liquids trioctylammonium bis(trifluoromethanesulfonyl)amide in the extraction of Pd and Pt, 742 carboxyl-functionalized ionic liquid: betainium bis(trifluoromethylsulfonyl)imide, for a combined leaching/extraction of Nd from a neodymium−iron-boron magnets (NdFeB) in the recycling process, 743 mixtures of trioctylammonium bis(trifluoromethanesulfonyl)amide and trioctylammonium nitrate for the extraction of aluminum(III), gallium(III), and indium(III) from hydrochloric acid solutions. 744 In addition immobilized AILs have been used in selective absorption and removal of Cr 6+ as well. 237 The protic ionic liquids have been used to extract metal ions by leaching from metal ores.…”

Section: Metal Extractions and Processingmentioning

confidence: 99%

“…In the last 5–6 years a fair number of research groups have explored the use of ionic liquids for the extraction and processing of metals and particularly rare earth metals. − Among the ionic liquids used in this applications, there are protic ionic liquids and carboxyl acid group functionalized ILs. The representative examples are the use of protic ionic liquids trioctylammonium bis(trifluoromethanesulfonyl)amide in the extraction of Pd and Pt, carboxyl-functionalized ionic liquid: betainium bis(trifluoromethylsulfonyl)imide, for a combined leaching/extraction of Nd from a neodymium–iron-boron magnets (NdFeB) in the recycling process, mixtures of trioctylammonium bis(trifluoromethanesulfonyl)amide and trioctylammonium nitrate for the extraction of aluminum(III), gallium(III), and indium(III) from hydrochloric acid solutions . In addition immobilized AILs have been used in selective absorption and removal of Cr 6+ as well…”

Section: Applications Of Acidic Ionic Liquidsmentioning

confidence: 99%

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Acidic Ionic Liquids

2016

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Ionic liquid with acidic properties is an important branch in the wide ionic liquid field and the aim of this article is to cover all aspects of these acidic ionic liquids, especially focusing on the developments in the last four years. The structural diversity and synthesis of acidic ionic liquids are discussed in the introduction sections of this review. In addition, an unambiguous classification system for various types of acidic ionic liquids is presented in the introduction. The physical properties including acidity, thermo-physical properties, ionic conductivity, spectroscopy, and computational studies on acidic ionic liquids are covered in the next sections. The final section provides a comprehensive review on applications of acidic ionic liquids in a wide array of fields including catalysis, CO2 fixation, ionogel, electrolyte, fuel-cell, membrane, biomass processing, biodiesel synthesis, desulfurization of gasoline/diesel, metal processing, and metal electrodeposition.

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Section: Metal Extractions and Processingmentioning

confidence: 99%

Section: Applications Of Acidic Ionic Liquidsmentioning

confidence: 99%

Acidic Ionic Liquids

2016

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“…Recently, interest has focused on hydrophobic protic ionic liquid, which can be simply prepared by mixing amine and acid, as an extractant. Palladium, platinum, and gallium extraction with protic ionic liquid, trioctylammonium nitrate, diluted in trioctylammonium bis(trifluoromethanesulfonyl)amide [TOAH][NTf 2 ] [12,13], copper extraction with protic ionic liquids composed of alkylamine and aliphatic carboxylic acid [14], and neodymium extraction with protic ionic liquid composed of Primene 81-R (primary amine) and CYANEX 572 (organophosphorus acidic compound) diluted in kerosene [15] have been reported. However, the equimolar mixtures of acids and bases has properties suggesting that proton transfer does not occur based on pKa values and other physical measurements [16].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Rare Earth Metal Ions with an Undiluted Hydrophobic Pseudoprotic Ionic Liquid

Matsumoto

Yamaguchi

Tahara

2020

Metals

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Recovering and concentrating rare earth metals (Nd and Dy) from waste permanent magnets rather than discarding them into the environment without pretreatment is critical for metal recycling and environmental responsibility. In this work, we used an undiluted hydrophobic pseudoprotic ionic liquid composed of trioctylamine and decanoic acid as an extractant to separate rare earth metals from aqueous media with a solvent extraction technique. This ionic liquid proved to be excellent with low viscosity and extractability reaching 100% for Nd and Dy in the presence of salts like sodium chloride and sodium nitrate. In acidic media, extractability decreased with increasing acid concentrations. Under all our experimental conditions, the rare earth metals (Nd and Dy) were found to be preferentially extracted compared to nickel with the distribution ratios of Dy higher than those of Nd.

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“…In addition, all the extractants have been used as mixtures with organic molecular solvents, which leads to health, safety, and environmental problems. We previously reported that the use of protic ammonium-based ionic liquids without dilution is effective for the extraction of anionic chloro complexes of metal ions [10][11][12]. Ionic liquids (ILs) are hardly volatile and recognized as green solvents.…”

Section: Introductionmentioning

confidence: 99%