scholarly journals The role of association of ions in ionic liquid/molecular solvent mixtures on metal extraction

2017 ◽  
Vol 19 (42) ◽  
pp. 28834-28840 ◽  
Author(s):  
J.-M. Andanson ◽  
N. Papaiconomou ◽  
P.-A. Cable ◽  
M. Traïkia ◽  
I. Billard ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Aqueous Phase ◽  
Ionic Association ◽  
Metal Extraction ◽  
Solvent Mixtures ◽  
Association Of Ions

Platinum extraction from aqueous phase into ionic liquid can be correlated to ionic association.

scholarly journals Utilizing Recyclable Task-Specific Ionic Liquid for Selective Leaching and Refining of Scandium from Bauxite Residue

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 818
Author(s):  
Eleni Mikeli ◽  
Efthimios Balomenos ◽  
Dimitrios Panias
Keyword(s):  
Aqueous Solution ◽  
Ionic Liquid ◽  
Aqueous Phase ◽  
Extractive Metallurgy ◽  
Bauxite Residue ◽  
Volume Ratio ◽  
Metal Extraction ◽  
Major Drawback ◽  
Processing Cost ◽  
Selective Increase

Ionic liquids (ILs) have attracted great interest in the field of extractive metallurgy mainly because they can be utilized in low temperature leaching processes where they exhibit selectivity and recyclability. A major drawback in mixed aqueous-IL systems, is IL dissolution in the aqueous phase, which leads to IL losses, increasing the overall processing cost. This study advances the method for recovering scandium (Sc) from bauxite residue (BR) using as leaching agent the IL betainium bistriflimide, [Hbet][Tf2N] mixed with water, which has been reported in previous publications. Ionic liquid leachate (IL-PLS) was prepared by leaching BR with a mixture of [Hbet][Tf2N]-H2O and subjected to different stripping experiments using hydrochloric acid. The advancement, presented in this work, is related with the optimization of the metal extraction (stripping) from the IL-PLS, where an aqueous solution with high Sc concentration and minimum metal impurities and minimum IL co-extraction is produced. It is further proven that the metal cation extraction is defined by the stoichiometry of the acidic solution and the dissolution (losses) of the IL in the aqueous phase can be minimized by adjusting the volume ratio and the acid concentration. A two-step stripping process described, achieves the selective increase of Sc concentration by 8 times in the aqueous solution, while maintaining cumulative IL losses to similar levels as the optimum 1 step non-Sc selective stripping process.

Liquid-liquid extraction of succinate using a dicopper cryptate

2020 ◽  
Author(s):  
Riccardo Mobili ◽  
Sonia La Cognata ◽  
Francesca Merlo ◽  
Andrea Speltini ◽  
Massimo Boiocchi ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Visible Spectrum ◽  
Tca Cycle ◽  
Residual Concentration ◽  
Waste Products ◽  
Liquid Liquid Extraction ◽  
The Tca Cycle ◽  
Quantitative Extraction ◽  
Uv Visible

<div> <p>The extraction of the succinate dianion from a neutral aqueous solution into dichloromethane is obtained using a lipophilic cage-like dicopper(II) complex as the extractant. The quantitative extraction exploits the high affinity of the succinate anion for the cavity of the azacryptate. The anion is effectively transferred from the aqueous phase, buffered at pH 7 with HEPES, into dichloromethane. A 1:1 extractant:anion adduct is obtained. Extraction can be easily monitored by following changes in the UV-visible spectrum of the dicopper complex in dichloromethane, and by measuring the residual concentration of succinate in the aqueous phase by HPLC−UV. Considering i) the relevance of polycarboxylates in biochemistry, as e.g. normal intermediates of the TCA cycle, ii) the relevance of dicarboxylates in the environmental field, as e.g. waste products of industrial processes, and iii) the recently discovered role of succinate and other dicarboxylates in pathophysiological processes including cancer, our results open new perspectives for research in all contexts where selective recognition, trapping and extraction of polycarboxylates is required. </p> </div>

scholarly journals Ionic liquids and deep eutectic solvents for the recovery of phenolic compounds: effect of ionic liquids structure and process parameters

RSC Advances ◽  
2021 ◽  
Vol 11 (20) ◽  
pp. 12398-12422
Author(s):  
Amir Sada Khan ◽  
Taleb H. Ibrahim ◽  
Nabil Abdel Jabbar ◽  
Mustafa I. Khamis ◽  
Paul Nancarrow ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Phenolic Compounds ◽  
Liquid Phase ◽  
Aqueous Phase ◽  
Process Parameters ◽  
Deep Eutectic Solvents

Extraction of phenol from aqueous phase to ionic liquid phase.

Investigation of Oxidoreductase Enzyme Catalysis in Water-Ionic Liquid (IL) Solvent Mixtures

2010 ◽  
Vol 43 (10-11) ◽  
pp. 1734-1745 ◽  
Author(s):  
Boglárka Takács ◽  
Livia Nagy ◽  
László Kollár ◽  
Géza Nagy
Keyword(s):  
Ionic Liquid ◽  
Enzyme Catalysis ◽  
Solvent Mixtures

Toluene degradation in a two-phase partitioning bioreactor involving a hydrophobic ionic liquid as a non-aqueous phase liquid

2017 ◽  
Vol 117 ◽  
pp. 31-38 ◽  
Author(s):  
Thi-vi-na Nguyen ◽  
Alfredo Santiago Rodriguez Castillo ◽  
Solène Guihéneuf ◽  
Pierre-François Biard ◽  
Ludovic Paquin ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Aqueous Phase ◽  
Toluene Degradation ◽  
Two Phase ◽  
Phase Partitioning ◽  
Partitioning Bioreactor ◽  
Hydrophobic Ionic Liquid ◽  
Phase Liquid ◽  
Two Phase Partitioning Bioreactor
Sign in / Sign up

Export Citation Format

Share Document