Aqueous ionic liquid solutions as alternatives for sulphide-free leather processing

2015 ◽  
Vol 17 (2) ◽  
pp. 1001-1007 ◽  
Author(s):  
R. Vijayaraghavan ◽  
N. Vedaraman ◽  
C. Muralidharan ◽  
A. B. Mandal ◽  
D. R. MacFarlane
Keyword(s):  
Tensile Strength ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Aqueous Solutions ◽  
Sodium Sulphide ◽  
Leather Industry ◽  
Leather Processing ◽  
Environmental Threat ◽  
Liquid Solutions ◽  
Dilute Aqueous Solutions

Sodium sulphide based depilation is common in the leather industry, but presents a serious environmental threat. In this study, efficient alternatives have been developed by employing dilute aqueous solutions of choline ionic liquids. The leather produced shows better tensile strength compared to conventional methods.

Water-assisted stability of carbene: cyclic voltammetric investigation of 1-ethyl-3-methylimidazolium ethylsulfate ionic liquid

2019 ◽  
Vol 21 (43) ◽  
pp. 24126-24131
Author(s):  
Preeti Jain ◽  
Vijay R. Chaudhari ◽  
Anil Kumar
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Aqueous Solutions ◽  
Electrochemical Studies ◽  
Cyclic Voltammetric ◽  
Dilute Aqueous Solutions

In this work, we report electrochemical studies on imidazolium-based ionic liquids with an objective to explore the possibility of carbene formation in their dilute aqueous solutions.

Measurement and Modeling of Solubility of Galactose in Aqueous Ionic Liquids, 1-Butyl-3-Methyl Imidazolium Bromide, 1-Hexyl-3-Methyl Imidazolium Bromide and 1-Butyl-3-Methylimidazolium Chloride at T = (298.15 And 308.15) K

2019 ◽  
Vol 25 (4) ◽  
pp. 319-330
Author(s):  
Mohammad Taghi Zafarani-Moattar ◽  
Hemayat Shekaari ◽  
Elnaz Mazaher Haji Agha
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Activity Coefficient ◽  
Aqueous Solutions ◽  
Mole Fraction ◽  
Gravimetric Method ◽  
Green Solvents ◽  
Salting Out ◽  
Liquid Solutions ◽  
Activity Coefficient Models

Background: Saccharides are considered as abundant, cheap and renewable starting materials for chemicals and fuels. Recently, ionic liquids have been used as green solvents for saccharides. The solubility values of galactose in aqueous ionic liquid solutions are not available. Thus, the main objective of this research was to determine the solubility of galactose in aqueous solutions containing ionic liquids, 1-butyl-3-methyl imidazolium bromide, [BMIm]Br, 1-butyl-3-methylimidazolium chloride [BMIm]Cl and 1-hexyl-3-methyl imidazolium bromide, [HMIm]Br at different mole fractions of ionic liquids at T = (298.15 and 308.15) K. Methods: In this study, the gravimetric method was used to measure the solubility of galactose in aqueous ionic liquids solutions. Results: The solubility values of galactose in water and aqueous ionic liquid solutions were correlated with the activity coefficient models of Wilson, NRTL, modified NRTL, NRF-NRTL, and UNIQUAC. Conclusion: It was concluded that with increasing the mole fraction of ionic liquids, the solubility values of galactose decrease and in fact all of these ionic liquids show salting-out effect on aqueous galactose solutions and this behavior is stronger in ionic liquid 1-butyl-3-methylimidazolium chloride.

Protein packaging in ionic liquid mixtures: an ecofriendly approach towards the improved stability of β-lactoglobulin in cholinium-based mixed ionic liquids

2020 ◽  
Vol 22 (26) ◽  
pp. 14811-14821 ◽  
Author(s):  
Anamika Sindhu ◽  
Sumit Kumar ◽  
Dibyendu Mondal ◽  
Indra Bahadur ◽  
Pannuru Venkatesu
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Aqueous Solutions ◽  
Liquid Mixtures ◽  
Improved Stability ◽  
Β Lactoglobulin

The present work demonstrates a pioneering approach for the packaging of β-LG with improved stability in the presence of aqueous solutions containing cholinium-based ionic liquid mixtures.

Degradation of lignin with aqueous ammonium-based ionic liquid solutions under milder conditions

2019 ◽  
Vol 43 (8) ◽  
pp. 3357-3365 ◽  
Author(s):  
Leta Deressa Tolesa ◽  
Bhupender S. Gupta ◽  
Ming-Jer Lee
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Liquid Solutions ◽  
Lignin Depolymerization

Ammonium-based ionic liquids can serve as solvents and promoters for lignin depolymerization.

Recovery of ionic liquids from dilute aqueous solutions by electrodialysis

Desalination ◽  
2012 ◽  
Vol 285 ◽  
pp. 205-212 ◽  
Author(s):  
Xiaoliang Wang ◽  
Yi Nie ◽  
Xiangping Zhang ◽  
Suojiang Zhang ◽  
Jianwei Li
Keyword(s):  
Ionic Liquids ◽  
Aqueous Solutions ◽  
Dilute Aqueous Solutions

scholarly journals Fabrication of polyacrylonitrile hollow fiber membranes from ionic liquid solutions

2016 ◽  
Vol 7 (1) ◽  
pp. 113-124 ◽  
Author(s):  
DooLi Kim ◽  
Nicolas Moreno ◽  
Suzana Pereira Nunes
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Hollow Fiber ◽  
Solvent Mixtures ◽  
Pore Morphology ◽  
Hollow Fiber Membranes ◽  
Lower Toxicity ◽  
Liquid Solutions ◽  
Polar Organic Solvents ◽  
Fiber Membranes

PAN hollow fiber membranes with good pore morphology have been fabricated using solvent mixtures of ionic liquids and DMSO, which has a lower toxicity than other commonly used polar organic solvents.

Ionic liquids in cross-coupling reactions: “liquid” solutions to a “solid” precipitation problem

2018 ◽  
Vol 54 (16) ◽  
pp. 2056-2059 ◽  
Author(s):  
Hemant Choudhary ◽  
Paula Berton ◽  
Gabriela Gurau ◽  
Allan S. Myerson ◽  
Robin D. Rogers
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Salt Precipitation ◽  
Solid Precipitation ◽  
Cross Coupling Reactions ◽  
Solid Salt ◽  
Liquid Solutions

To alleviate the problem of solid salt precipitation when using inorganic bases in cross-coupling reactions, basic anions were combined with the trihexyl(tetradecyl)phosphonium ([P66614]+) cation to ensure an ionic liquid byproduct.

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