Room Temperature Ionic Liquids as Novel Media for Zn Ions Extraction from Aqueous Solutions

2012 ◽  
Vol 1380 ◽  
Author(s):  
Leticia E. Hernández Cruz ◽  
Felipe Legorreta García ◽  
Ana M. Herrera González
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Extraction Process ◽  
Distribution Coefficients ◽  
Liquid Extraction ◽  
Metal Extraction ◽  
High Affinity ◽  
Low Viscosity ◽  
Liquid Liquid Extraction ◽  
Zn Ions

ABSTRACTWastewaters often contain offensive cations. Because of their high affinity for water, it is difficult to remove those using conventional solvents for liquid- liquid extraction [1]. Hydrophobic ionic liquids may provide a useful extraction process. Because the properties of ionic liquids are turnable, it may be possible to identify some ionic liquids that have low viscosity, very low solubility in water, and high affinity for select metal ions [2]. In this sense in this work liquid- liquid extraction of dilute Zn ions from water was performed near room temperature with two ionic liquids (IL). Distribution coefficients are reported for Zn ions extracted with bromide 1-hexyl-pyridinium and bromide 1-octyl-pyridinium diluted in decanol. The extraction has been studied, and these confirmed that the metal extraction proceeds via a cation – exchange mechanism. Furthermore, stripping of Zn (II) from ILs into an aqueous phase by sulfuric acid (1 M) and recycling of the extracting ILs phase was successfully accomplished.

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.

scholarly journals Application of a ternary phase diagram to the liquid-liquid extraction of ethanoic acid using ethyl ethanoate

2019 ◽  
Vol 44 (3) ◽  
pp. 43-49
Author(s):  
Aline Amaral Madeira
Keyword(s):  
Phase Diagram ◽  
Ternary Phase ◽  
Ternary Phase Diagram ◽  
Extraction Process ◽  
Distribution Coefficients ◽  
Liquid Extraction ◽  
Ethanoic Acid ◽  
Liquid Liquid Extraction ◽  
Equilibrium Data ◽  
Tie Lines

This article was elaborated in an approach to the liquid-liquid equilibrium of the extraction process of ethanoic acid (C2H4O2) in aqueous phase using ethyl ethanoate as solvent. The liquid-liquid extraction was modeled by the construction of a ternary phase diagram for the water-ethanoic acid- ethyl ethanoate system with the aid of the Origin software. The equilibrium data were obtained experimentally by titration at room temperature (298.15 K) and atmospheric pressure (101325 Pa) using four mixtures of water, ethanoic acid, and ethyl ethanoate. The determination of the composition of the extract and residue portions in the equilibrium of each mixture by of the tie-lines method allowed to examine the percentages of liquid-liquid extraction achieved. The distribution coefficients and separation factors calculated made it possible an evaluation of the distribution and of the mutual solubility of the solute in the aqueous and organic phases. The results showed a good performance of ethyl ethanoate in the extraction of ethanoic acid for concentrations of solute until 16% of the feed.

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.

Room temperature ionic liquids as novel media for ‘clean’ liquid–liquid extraction

1998 ◽  
pp. 1765-1766 ◽  
Author(s):  
Jonathan G. Huddleston ◽  
Heather D. Willauer ◽  
Richard P. Swatloski ◽  
Ann E. Visser ◽  
Robin D. Rogers
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Liquid Extraction ◽  
Room Temperature Ionic Liquids ◽  
Liquid Liquid Extraction

LIQUID/LIQUID EXTRACTION OF METAL IONS IN ROOM TEMPERATURE IONIC LIQUIDS

2001 ◽  
Vol 36 (5-6) ◽  
pp. 785-804 ◽  
Author(s):  
Ann E. Visser ◽  
Richard P. Swatloski ◽  
Scott T. Griffin ◽  
Deborah H. Hartman ◽  
Robin D. Rogers
Keyword(s):  
Ionic Liquids ◽  
Metal Ions ◽  
Room Temperature ◽  
Liquid Extraction ◽  
Room Temperature Ionic Liquids ◽  
Liquid Liquid Extraction

Liquid–liquid extraction of caprolactam from water using room temperature ionic liquids

2013 ◽  
Vol 104 ◽  
pp. 263-267 ◽  
Author(s):  
Dong-xuan Chen ◽  
Xiao-kun OuYang ◽  
Yang-guang Wang ◽  
Li-ye Yang ◽  
Chao-hong He
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Liquid Extraction ◽  
Room Temperature Ionic Liquids ◽  
Liquid Liquid Extraction

Design and Synthesis of Piperazine-Based Task-Specific Ionic Liquids for Liquid–Liquid Extraction of CuII, NiII, and CoII from Water

2015 ◽  
Vol 68 (5) ◽  
pp. 825 ◽  
Author(s):  
Weiyuan Xu ◽  
Liang Wang ◽  
Jianying Huang ◽  
Gerui Ren ◽  
Dandan Xu ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Metal Ions ◽  
Functional Groups ◽  
Extraction Process ◽  
Liquid Extraction ◽  
Intrinsic Structure ◽  
Design And Synthesis ◽  
Coordination Sites ◽  
Liquid Liquid Extraction ◽  
Effects Of Ph

The novel synthesis of task-specific ionic liquids (TSILs) introducing piperazine substructures was described. Piperazine functional groups were easily grafted onto an imidazolium cationic derivative via a simple four-step process starting from available materials such as imidazole, ethylene glycol, and 1-butylamine or 3-dimethylaminopropylamine. Effects of pH, temperature, and structure of functional groups on the performance of liquid–liquid extraction of Cu2+, Ni2+, and Co2+ from water were investigated. It was found that TSILs were efficient for removal of these metal ions in mild acid solutions. The TSIL with an extra nitrogen atom showed a higher capability to separate metal ions, especially for Cu2+. This may be ascribed to the intrinsic structure of the functional groups – the more coordination sites, the higher the affinity for the metal ions. Furthermore, the thermodynamics indicated that the extraction process was exothermic and spontaneous in nature.

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