Separations of metal ions using ionic liquids: The challenges of multiple mechanisms

Cocalia, Violina A.; Holbrey, John D.; Gutowski, Keith E.; Bridges, Nicholas J.; Rogers, Robin D.

doi:10.1016/s1007-0214(06)70174-2

Cited by 79 publications

(43 citation statements)

References 17 publications

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“…Composition of ILs (Bradaric et al, 2003a(Bradaric et al, , 2003bCocalia et al, 2005a;Del Sesto et al, 2005;Han & Armstrong, 2007;Hunddleston et al, 1998;Pernak et al, 2005;Visser et al, 2001a;Visser et al, 2002a;.…”

Section: Cationmentioning

confidence: 99%

Ionic Liquids in Separation of Metal Ions from Aqueous Solutions

Regel‐Rosocka¹,

Wiśniewski²

2011

Applications of Ionic Liquids in Science and Technology

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Section: Cationmentioning

confidence: 99%

Ionic Liquids in Separation of Metal Ions from Aqueous Solutions

Regel‐Rosocka¹,

Wiśniewski²

2011

Applications of Ionic Liquids in Science and Technology

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“…As regards hexafluorophosphate-containing ionic liquids, their hydrolysis instability has often been noted in literature [16][17][18] especially at high temperature and in the presence of strong acids. Hydrolysis of forms a mixture of products, including HF, POF 3 N] to the aqueous solution was achieved in 24 h, being the metal ion partition in the ionic liquid equal to 12% again. Anyway, in both cases, if temperature was once more raised up to 333.15 K, extraction percentages get back to the initial value, i.e.…”

Section: Cu(ii) Extraction In Ionic Liquidsmentioning

confidence: 99%

“…It is noteworthy that significant differences both in efficiency and chemical equilibria can be found between RTILs and organic solvents when employed in biphasic systems [2]. Many efforts have been made to elucidate the mechanism of partitioning, and it was found to be dependent on the nature of the extractant molecule, the species in the aqueous phase and the hydrophobic/hydrophilic balance of the ionic liquid [3]. However, a thorough comparison among traditional molecular solvents and ionic liquids is not available yet, and only few attempts have been carried out to understand what kind of correlations can be set between specific chemico-physical properties and the observed partitioning effect [4,5].…”

Section: Introductionmentioning

confidence: 99%

Cu(II) Extraction in Ionic Liquids and Chlorinated Solvents: Temperature Effect

Germani¹,

Mancini²,

Spreti

et al. 2011

GSC

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Room temperature ionic liquids have been currently used in liquid/liquid extraction processes in order to substitute conventional organic solvents. In this paper, a series of chlorinated solvents and 1-alkyl-3-methylimidazolium-based ionic liquids were selected to study the extraction efficiency of a lipophilic polyamine 1,1,7,7-tetraethyl-4-tetradecyldiethylenetriamine (TE14DT) towards the model ion Cu(II) in such different media. The effect of temperature on the extraction efficiency was also investigated. The metal ion partition was found to be strongly dependent on both the nature of the solvent and on the working temperature. The viscosity of ionic liquids and the water content in ionic liquid were found to affect the extraction efficiency of TE14DT. The chemical nature of the cation of ionic liquids, and in particular the alkyl chain length on imidazolium ring, also seemed to be important in determining the efficiency of the extraction process. Finally, preliminary experiments on back-extraction of Cu(II) ions from ionic liquid also revealed interesting hints to the development of a continuous transport process.

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“…Thus for a successive extraction of cations from aqueous solution into a hydrophobic RTIL some complexing agents are required (Cocalia et al, 2006a;Visser et al, 2000) as well as in the case of conventional organic solvents. These agents are either added to RTIL or are synthetically included into the RTIL's anion or cation structure (task-specific RTILs).…”

Section: Thermodynamics Of Complex Formation In Rtilmentioning

confidence: 99%

“…The present review is therefore focused on the role of cation complexes in RTIL-based metal ion separations, while the other important aspects of inorganic salt behaviour in RTILs are excellently summarised in another chapter of this book (Nockemann, 2011). RTILs are intensively studied in solvent extraction processes due to such important advantages over conventional organic diluents as negligible vapor pressure, low flammability, moisture stability, relatively high radiation stability, different extraction properties and possibility to eliminate aqueous phase acidification (Cocalia et al, 2006a;Visser et al, 2000;Dai et al, 1999;Luo et al, 2006;Chen, 2007;Chun et al, 2001;Visser & Rogers, 2003). It is demonstrated that extraction efficacy of RTIL can be also modulated by a chelating agent administration.…”

Section: Introductionmentioning

confidence: 99%