Efficient extraction of gold from water by liquid–liquid extraction or precipitation using hydrophobic ionic liquids

2014 ◽  
Vol 38 (11) ◽  
pp. 5573-5581 ◽  
Author(s):  
Stéphanie Boudesocque ◽  
Aminou Mohamadou ◽  
Laurent Dupont
Keyword(s):  
Ionic Liquids ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction ◽  
Efficient Extraction ◽  
Hydrophobic Ionic Liquids

Tetrahalogenoaurate anions have been successfully removed from water using betaine derivative cationic ionic liquids, by precipitation using hydrophilic ionic liquids or by liquid–liquid extraction with hydrophobic ionic liquids.

scholarly journals Extraction of iridium(iv) from aqueous solutions using hydrophilic/hydrophobic ionic liquids

RSC Advances ◽  
2014 ◽  
Vol 4 (89) ◽  
pp. 48260-48266 ◽  
Author(s):  
Nicolas Papaiconomou ◽  
Isabelle Billard ◽  
Eric Chainet
Keyword(s):  
Ionic Liquids ◽  
Aqueous Solutions ◽  
Metal Complexes ◽  
Distribution Coefficients ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction ◽  
Anionic Metal Complexes ◽  
Hydrophobic Ionic Liquids ◽  
P Removal

Removal of iridium(iv) using hydrophilic or hydrophobic ionic liquids was studied. IrCl62− anionic metal complexes were precipitated out from water using bromide-based ionic liquids, yielding water-insoluble salts with low Ks values. Liquid–liquid extraction of Ir(iv) using [NTf2]-based ionic liquids yielded distribution coefficients up to 70 with [OMIM][NTf2] at pH 2.

Liquid-liquid extraction of chlorophenols from wastewater using hydrophobic ionic liquids

2019 ◽  
Vol 294 ◽  
pp. 111680 ◽  
Author(s):  
R. Sulaiman ◽  
I. Adeyemi ◽  
S.R. Abraham ◽  
S.W. Hasan ◽  
I.M. AlNashef
Keyword(s):  
Ionic Liquids ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction ◽  
Hydrophobic Ionic Liquids

scholarly journals Liquid-Liquid Extraction in Systems Containing Butanol and Ionic Liquids – A Review

2017 ◽  
Vol 38 (1) ◽  
pp. 97-110 ◽  
Author(s):  
Artur Kubiczek ◽  
Władysław Kamiński
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Liquid Extraction ◽  
Butanol Production ◽  
Model Liquid ◽  
New Class ◽  
Liquid Liquid Extraction ◽  
Liquid Systems ◽  
Nrtl Equation ◽  
Equilibrium Data

AbstractRoom-temperature ionic liquids (RTILs) are a moderately new class of liquid substances that are characterized by a great variety of possible anion-cation combinations giving each of them different properties. For this reason, they have been termed as designer solvents and, as such, they are particularly promising for liquid-liquid extraction, which has been quite intensely studied over the last decade. This paper concentrates on the recent liquid-liquid extraction studies involving ionic liquids, yet focusing strictly on the separation of n-butanol from model aqueous solutions. Such research is undertaken mainly with the intention of facilitating biological butanol production, which is usually carried out through the ABE fermentation process. So far, various sorts of RTILs have been tested for this purpose while mostly ternary liquid-liquid systems have been investigated. The industrial design of liquid-liquid extraction requires prior knowledge of the state of thermodynamic equilibrium and its relation to the process parameters. Such knowledge can be obtained by performing a series of extraction experiments and employing a certain mathematical model to approximate the equilibrium. There are at least a few models available but this paper concentrates primarily on the NRTL equation, which has proven to be one of the most accurate tools for correlating experimental equilibrium data. Thus, all the presented studies have been selected based on the accepted modeling method. The reader is also shown how the NRTL equation can be used to model liquid-liquid systems containing more than three components as it has been the authors’ recent area of expertise.

Experimental and numerical investigation of electrostatic spray liquid-liquid extraction with ionic liquids

2012 ◽  
Vol 33 (1) ◽  
pp. 167-183 ◽  
Author(s):  
Marek Krawczyk ◽  
Kamil Kamiński ◽  
Jerzy Petera
Keyword(s):  
Ionic Liquids ◽  
Numerical Investigation ◽  
High Viscosity ◽  
Liquid Extraction ◽  
Separation Processes ◽  
Organic Mixture ◽  
Liquid Liquid Extraction ◽  
Key Factor ◽  
A New Technique ◽  
Electrostatic Spray

Experimental and numerical investigation of electrostatic spray liquid-liquid extraction with ionic liquids A new concept of an electrostatic spray column for liquid-liquid extraction was investigated. An important problem for separation processes is the presence of azeotropic or close-boiling mixtures in their production, for example heptane with ethanol, since the separation is impossible by ordinary distillation. The use of ionic liquids (IL) as a dispersed solvent specially engineered for any specific organic mixture in terms of selectivity is a key factor to successful separation. As IL present particularly attractive combination of favorable characteristics for the separation of heptane and ethanol, in this work we use 1-butyl-3-methylimidazolium methyl sulfate [BMIM][MeSO4]. Because of high viscosity and relatively high cost of IL a new technique was introduced, consisting in the electrostatically spray generation to enhance the mass transport between the phases. In order to optimally design the geometry of the contactor a series of numerical simulation was performed. Especially multi-nozzle variants for better exploitation of contactor volume were investigated. Experiments showed excellent possibility of control of the dispersion characteristics by applied voltage and thus control of the rate of extraction. The preliminary simulations based on our mathematical model for a three nozzle variant exhibited visual agreement with the theory of electrostatics.

ZIF-8-porous ionic liquids for the extraction of 2,2,3,3-tetrafluoro-1-propanol and water mixture

2021 ◽  
Author(s):  
Zenghui Wang ◽  
Pingping Zhao ◽  
Jimin Wu ◽  
Jun Gao ◽  
Lianzheng Zhang ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Special Class ◽  
Liquid Extraction ◽  
Water Mixture ◽  
Liquid Liquid Extraction

The design of stable ionic liquids (ILs) has become crucial for efficient liquid-liquid extraction (LLE) of alcohol and water. Porous ionic liquids (PILs), as a special class of ILs, have...

Liquid–liquid extraction of hydroxytyrosol, tyrosol, and oleuropein using ionic liquids

2018 ◽  
Vol 54 (17) ◽  
pp. 2895-2906 ◽  
Author(s):  
Romero Julio ◽  
Carlos Zambra ◽  
Gastón Merlet ◽  
Rene Cabezas ◽  
Gonzalo Correa ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction

The Ethylbenzene/Styrene Preferential Separation with Ionic Liquids in Liquid–Liquid Extraction

2018 ◽  
Vol 47 (10) ◽  
pp. 1578-1596 ◽  
Author(s):  
Monika Karpińska ◽  
Michał Wlazło ◽  
Urszula Domańska
Keyword(s):  
Ionic Liquids ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction

scholarly journals Recovery and Elimination of Phenolic Pollutants from Water Using [NTf2] and [Nf2]-Based Ionic Liquids

2019 ◽  
Vol 9 (20) ◽  
pp. 4321
Author(s):  
Sas ◽  
Domínguez ◽  
González
Keyword(s):  
Ionic Liquids ◽  
Phenolic Compounds ◽  
Extraction Yield ◽  
Liquid Extraction ◽  
Industrial Growth ◽  
Extraction Solvent ◽  
Phenolic Pollutants ◽  
Liquid Liquid Extraction ◽  
Volatile Organic ◽  
Extraction Solvents

At present, pollution is one of the most important problems worldwide. Industrial growth makes it necessary to develop techniques to remove pollutant substances from water, since water is an important natural source for life. One of these techniques is liquid–liquid extraction, which is used to remove phenolic compounds from wastewaters. Volatile organic compounds are used as common extraction solvents in liquid–liquid extractions; nevertheless, some of their properties, such as toxicity and volatility, make it necessary to replace them with other less toxic solvents. In this work, the capability of four ionic liquids, based on bis(trifluoromethylsulfonyl)imide [NTf2] and bis(fluorosulfonyl)imide [Nf2] anions and different cations to remove phenolic compounds from water was studied. The phenolic compounds used in this study were phenol, o-cresol, and 2-chlorophenol, and the effects of the extraction solvent and phenol structures were analyzed. For that, a liquid–liquid extraction was carried out, and the extraction yield was determined. In general, high extraction efficiencies were obtained for all studied systems, obtaining the highest extraction efficiencies using the pyrrolidinium cation-based ionic liquids.

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