scholarly journals Synthesis of chiral ionic liquids by ion cross-metathesis: en route to enantioselective water–ionic liquid extraction (EWILE), an eco-friendly variant of the ELLE process

2012 ◽  
Vol 48 (26) ◽  
pp. 3185 ◽  
Author(s):  
Viacheslav Zgonnik ◽  
Chantal Zedde ◽  
Yves Génisson ◽  
Marie-Rose Mazières ◽  
Jean-Christophe Plaquevent
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Liquid Extraction ◽  
Chiral Ionic Liquids ◽  
Cross Metathesis

ChemInform Abstract: Synthesis of Chiral Ionic Liquids by Ion Cross-Metathesis: en route to Enantioselective Water-Ionic Liquid Extraction (EWILE), an Eco-Friendly Variant of the ELLE Process.

ChemInform ◽  
2012 ◽  
Vol 43 (30) ◽  
pp. no-no
Author(s):  
Viacheslav Zgonnik ◽  
Chantal Zedde ◽  
Yves Genisson ◽  
Marie-Rose Mazieres ◽  
Jean-Christophe Plaquevent
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Liquid Extraction ◽  
Chiral Ionic Liquids ◽  
Cross Metathesis

scholarly journals Enantioseparation of flurbiprofen enantiomers using chiral ionic liquids by liquid‐liquid extraction

Chirality ◽  
2019 ◽  
Vol 31 (6) ◽  
pp. 457-467 ◽  
Author(s):  
Xing Cui ◽  
Qi Ding ◽  
Ruo‐Ni Shan ◽  
Chao‐Hong He ◽  
Ke‐Jun Wu
Keyword(s):  
Ionic Liquids ◽  
Liquid Extraction ◽  
Chiral Ionic Liquids ◽  
Liquid Liquid Extraction ◽  
Flurbiprofen Enantiomers

scholarly journals Proline Based Chiral Ionic Liquids for Enantioselective Michael Reaction

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Kaoru Nobuoka ◽  
Satoshi Kitaoka ◽  
Tsutomu Kojima ◽  
Yuuki Kawano ◽  
Kazuya Hirano ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Ionic Liquids ◽  
Positive Charge ◽  
Michael Reaction ◽  
Chiral Synthesis ◽  
Chiral Catalyst ◽  
New Approach ◽  
Chiral Ionic Liquids ◽  
Chiral Ionic Liquid

Chiral ionic liquids, starting from (S)-proline, have been prepared and evaluated the ability of a chiral catalyst. In Michael reaction of trans-β-nitrostyrene and cyclohexanone, all the reactions were carried out under homogeneous conditions without any solvent except for excess cyclohexanone. The chiral ionic liquid catalyst with the positive charge delocalized bulky pyrrolidinium cation shows excellent yields (up to 92%), diastereoselectivities (syn/anti = 96/4), and enantioselectivities (up to 95% ee) and could be reused at least three times without any loss of its catalytic activity. Such results demonstrated a promising new approach for green and economic chiral synthesis by using the chiral ionic liquids as a chiral catalyst and a chiral medium.

scholarly journals PURIFICATION OF 1-BUTYL-3-METHYLIMIDAZOLIUM CHLORIDE AFTER DISSOLUTION OF WHEAT STRAW

2018 ◽  
Vol 61 (3) ◽  
pp. 83
Author(s):  
Sergei N. Evstaf’ev ◽  
Cuong Q Hoang
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Activated Carbon ◽  
Wheat Straw ◽  
Organic Solvents ◽  
Supercritical Co2 ◽  
Liquid Extraction ◽  
Lignocellulosic Materials ◽  
Supercritical Co2 Extraction ◽  
Actual Problem

The existing technologies for the extraction of polysaccharides and lignin from lignocellulosic materials from an ecological and economic point of view are imperfect. The solution of this actual problem at present day is possible by heat treatment of lignocellulosic materials at the atmospheric pressure and relatively low temperature in the environment of ionic liquids. The use of ionic liquids for the fractionation of lignocellulosic raw materials isn't found industrial application because of their relatively high cost and sensitivity to contamination, despite the unique set of physico-chemical properties for dissolving cellulose. The solution of the problem is possible by reusing ionic liquid in the technological process without losing their effectiveness, which requires purification from impurities. The purpose of thе work was the comparative research of the efficiency of purification of 1-butyl-3-methylimidazolium chloride by adsorption on activated carbon, liquid extraction by organic solvents (benzene, dioxane, tetrahydrofuran) and supercritical CO2 extraction. It has been established that the methods of liquid extraction, supercritical CO2 extraction and adsorption on activated carbon can be used to purify 1-butyl-3-methylimidazolium chloride from extractives of wheat straw. For the purpose of comparison of efficiency of purification with above-mentioned methods the GC-MS, IR- and 1H NMR spectroscopy were used. It was revealed that extraction of impurities by organic solvents, such as benzene, dioxane and tetrahydrofuran, allows to reduce significantly their content in ionic liquid while supercritical CO2-extraction and adsorption on activated carbon almost completely remove impurities. Considering the substantial losses of the ionic liquid when using adsorption to purify 1-butyl-3-methylimidazolium chloride from the extractives of wheat straw, a supercritical CO2 extraction method can be recommended for use.Forcitation:Evstaf’ev S.N., Hoang C.Q. Purification of 1-butyl-3-methylimidazolium chloride after dissolution of wheat straw. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 3. P. 83-87

scholarly journals Chiral Ionic Liquids: Structural Diversity, Properties and Applications in Selected Separation Techniques

2020 ◽  
Vol 21 (12) ◽  
pp. 4253 ◽  
Author(s):  
Jolanta Flieger ◽  
Joanna Feder-Kubis ◽  
Małgorzata Tatarczak-Michalewska
Keyword(s):  
Ionic Liquids ◽  
Solid Phase ◽  
Design Feature ◽  
Structural Diversity ◽  
Liquid Extraction ◽  
Green Solvents ◽  
Two Phase ◽  
Separation Techniques ◽  
Chiral Ionic Liquids ◽  
Liquid Liquid Extraction

Ionic liquids (ILs) are chemical compounds composed of ions with melting points below 100 °C exhibiting a design feature. ILs are commonly used as the so-called green solvents, reagents or highly efficient catalysts in varied chemical processes. The huge application potential of ionic liquids (IL) justifies the growing interest in these compounds. In the last decade, increasing attention has been devoted to the development of new methods in the synthesis of stable chiral ionic liquids (CILs) and their application in various separation techniques. The beginnings of the successful use of CILs to separate enantiomers date back to the 1990 s. Most chiral ILs are based on chiral cations or chiral anions. There is also a limited number of CILs possessing both a chiral cation and a chiral anion. Due to the high molecular diversity of both ions, of which at least one has a chiral center, we have the possibility to design a large variety of optically active structures, thus expanding the range of CIL applications. Research utilizing chiral ionic liquids only recently has become more popular. However, it is the area that still has great potential for future development. This review aimed to describe the diversity of structures, properties and examples of applications of chiral ionic liquids as new chiral solid materials and chiral components of the anisotropic environment, providing chiral recognition of enantiomeric analytes, which is useful in liquid chromatography, countercurrent chromatography and other various CIL-based extraction techniques including aqueous biphasic (ABS) extraction systems, solid–liquid two-phase systems, liquid–liquid extraction systems with hydrophilic CILs, liquid–liquid extraction systems with hydrophobic CILs, solid-phase extraction and induced-precipitation techniques developed in the recent years. The growing demand for pure enantiomers in the pharmaceutical and food industries sparks further development in the field of extraction and separation systems modified with CILs highlighting them as affordable and environmentally friendly both chiral selectors and solvents.

scholarly journals Synthesis of glucose esters from cellulose in ionic liquids

Holzforschung ◽  
2012 ◽  
Vol 66 (4) ◽  
Author(s):  
Igor A. Ignatyev ◽  
Charlie Van Doorslaer ◽  
Pascal G.N. Mertens ◽  
Koen Binnemans ◽  
Dirk E. de Vos
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Acetic Anhydride ◽  
Liquid Extraction ◽  
Simple Liquid ◽  
Reaction Conditions ◽  
Liquid Liquid Extraction ◽  
Optimized Conditions ◽  
Glucose Pentaacetate ◽  
Acidic Resin

Abstract The transformation of cellulose into glucose ester α-d-glucose pentaacetate (GPAc) was carried out in ionic liquid 1-butyl-3-methylimidazolium chloride under mild reaction conditions. The reaction comprises two steps: the first involves a hydrolysis reaction, yielding α-d-glucose and glucose oligomers; and then only after some time, the acetylating reagent acetic anhydride is added. Under optimized conditions and with the acidic resin Amberlyst 15DRY as a hydrolysis catalyst, a 70% yield of GPAc was obtained. This product could be quantitatively isolated by simple liquid-liquid extraction, which allowed easy recycling of the ionic liquid and catalyst.

An ionic liquid extraction process for the separation of indole from wash oil

2015 ◽  
Vol 17 (7) ◽  
pp. 3783-3790 ◽  
Author(s):  
Tiantian Jiao ◽  
Xulei Zhuang ◽  
Hongyan He ◽  
Lihong Zhao ◽  
Chunshan Li ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Process Simulation ◽  
Environmentally Friendly ◽  
Extraction Process ◽  
Liquid Extraction ◽  
Separation Process

Imidazolium-based ionic liquids (IBILs) were developed as an extraction medium to separate indole from wash oil. The process is environmentally friendly and the IBILs could be easily recycled. The extraction conditions are very mild. A separation process is proposed based on the process simulation.

Mapping the “Extra Solvent Power, ESP” of Ionic Liquids for Monomers, Polymers and Globular Nanoparticles

2017 ◽  
Author(s):  
Jose A. Pomposo
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Linear Polymers ◽  
Green Solvents ◽  
Ionic Polymers ◽  
First Time ◽  
Solvent Power

Understanding the miscibility behavior of ionic liquid (IL) / monomer, IL / polymer and IL / nanoparticle mixtures is critical for the use of ILs as green solvents in polymerization processes, and to rationalize recent observations concerning the superior solubility of some proteins in ILs when compared to standard solvents. In this work, the most relevant results obtained in terms of a three-component Flory-Huggins theory concerning the “Extra Solvent Power, ESP” of ILs when compared to traditional non-ionic solvents for monomeric solutes (case I), linear polymers (case II) and globular nanoparticles (case III) are presented. Moreover, useful ESP maps are drawn for the first time for IL mixtures corresponding to case I, II and III. Finally, a potential pathway to improve the miscibility of non-ionic polymers in ILs is also proposed.

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