Degradation of Cellulose in Dilute Aqueous Solutions of Acidic Ionic Liquid 1-(1-Propylsulfonic)-3-methylimidazolium Chloride, andp-Toluenesulfonic Acid at Moderate Temperatures and Pressures

2011 ◽  
Vol 50 (21) ◽  
pp. 12276-12280 ◽  
Author(s):  
Ananda S. Amarasekara ◽  
Bernard Wiredu
Keyword(s):  
Ionic Liquid ◽  
Aqueous Solutions ◽  
Acidic Ionic Liquid ◽  
Toluenesulfonic Acid ◽  
Dilute Aqueous Solutions

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.

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.

scholarly journals Ionic Liquid Salt Bridge in Dilute Aqueous Solutions

2007 ◽  
Vol 23 (9) ◽  
pp. 1049-1052 ◽  
Author(s):  
Takahiro YOSHIMATSU ◽  
Takashi KAKIUCHI
Keyword(s):  
Ionic Liquid ◽  
Aqueous Solutions ◽  
Salt Bridge ◽  
Liquid Salt ◽  
Dilute Aqueous Solutions

scholarly journals Polyelectrolyte multilayer modified nanofiltration membranes for the recovery of ionic liquid from dilute aqueous solutions

2017 ◽  
Vol 134 (39) ◽  
pp. 45349 ◽  
Author(s):  
Alexandru M. Avram ◽  
Pejman Ahmadiannamini ◽  
Anh Vu ◽  
Xianghong Qian ◽  
Arijit Sengupta ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Aqueous Solutions ◽  
Nanofiltration Membranes ◽  
Polyelectrolyte Multilayer ◽  
Dilute Aqueous Solutions

1, 1’-Sulfinyldiethylammonium Bis (Hydrogen Sulfate) as a Recyclable Dicationic Ionic Liquid Catalyst for the Efficient Solvent-free Synthesis of 3, 4-Dihydropyrimidin-2(1H)-ones via Biginelli Reaction

2020 ◽  
Vol 23 (2) ◽  
pp. 157-167
Author(s):  
Zainab Ehsani-Nasab ◽  
Ali Ezabadi
Keyword(s):  
Ionic Liquid ◽  
Biginelli Reaction ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Hydrogen Sulfate ◽  
One Pot ◽  
Acidic Ionic Liquid ◽  
Brønsted Acidic Ionic Liquid ◽  
Solvent Free Conditions ◽  
Dicationic Ionic Liquid

Objective: A facile and efficient method for synthesis of 3, 4-dihydropyrimidin-2(1H)-ones via Biginelli reaction catalyzed by a novel dicationic Brönsted acidic ionic liquid, [(EtNH2)2SO][HSO4]2, has been successfully developed. Material and Method:: 3, 4-Dihydropyrimidin-2(1H)-ones were synthesized through one-pot condensation of aromatic aldehydes, ethyl acetoacetate, and urea under solvent-free conditions using [(EtNH2)2SO][HSO4]2 as a novel catalyst. The progress of the reaction was monitored by thin-layer chromatography (ethyl acetate / n-hexane = 1 / 5). The products have been characterized by IR, 1H NMR, 13C NMR, and also by their melting points. Results: In this research, a library of dihydropyrimidinone derivatives was synthesized via Biginelli reaction under solvent-free conditions at 120oC using [(EtNH2)2SO][HSO4]2 as a catalyst. Various aromatic aldehydes, as well as heteroaromatic aldehydes, were employed, affording good to high yields of the corresponding products and illustrating the substrate generality of the present method. In addition, the prepared dicationic Brönsted acidic ionic liquid can be easily recovered and reused. Conclusion: 1, 1’-Sulfinyldiethylammonium bis (hydrogen sulfate), as a novel dicationic ionic liquid, can act as a highly efficient catalyst for the synthesis of 3, 4-dihydropyrimidin-2(1H)-ones under solvent-free conditions.

Synthesis and Characterization of a Novel Ionic Liquid Based on N,N,N,N-tetramethylethylenediamine and its Application in the Synthesis of 1,8-dioxo-octahydro Xanthenes

2018 ◽  
Vol 21 (7) ◽  
pp. 526-532 ◽  
Author(s):  
Zahra Abdi Piralghar ◽  
Mohammad Mahmoodi Hashemi ◽  
Ali Ezabadi
Keyword(s):  
Ionic Liquid ◽  
Chlorosulfonic Acid ◽  
Solvent Free ◽  
Aryl Aldehydes ◽  
Acidic Ionic Liquid ◽  
Brønsted Acidic Ionic Liquid ◽  
Solvent Free Conditions ◽  
Aryl Aldehyde ◽  
High Yields

Aim and Objective: In this work, we synthesized and characterized a novel Brönsted acidic ionic liquid from the reaction of N, N, N’, N’-tetramethylethylenediamine with chlorosulfonic acid and explored its catalytic activity in 1, 8-dioxo-octahydroxanthenes synthesis. Materials and Methods: Dimedone, aryl aldehydes, and the ionic liquid as the catalyst were reacted under solvent-free conditions. The progressive of the reaction was monitored by a thin layer of chromatography (ethyl acetate/n-hexane = 1/5). All products were characterized as the basis of their spectra data and melting point by comparison with those reported in the literature. Results: The prepared ionic liquid was successfully applied in the synthesis of 1, 8-dioxooctahydroxanthenes in good to high yields on the reaction of aryl aldehyde and dimedone at 120oC under solvent-free conditions. Conclusion: This research demonstrates that the catalyst is impressive for 1, 8-dioxo-octahydroxanthenes synthesis under solvent-free conditions.

The reactions of oligoalcohols with arsenic, arsenous, boric and germanic acids

1980 ◽  
Vol 45 (10) ◽  
pp. 2645-2655 ◽  
Author(s):  
Antonín Mikan ◽  
Miloš Bartušek
Keyword(s):  
Aqueous Solutions ◽  
Equilibrium Constants ◽  
Dilute Aqueous Solutions

The reactions of sorbitol, mannitol, adonitol, dulcitol, glucose and glycerol with H3AsO4, H3AsO3, H3BO3 and GeO2 acids in dilute aqueous solutions were studied by potentiometric neutralization titrations. The formation of the following chelates was demonstrated: As(V)L3-, As(III)L(OH)2-, HAs(III)L(OH)2, BL2-, GeL2(OH)- and GeL32- and the equilibrium constants for their formation were found. Conditions for formation of these chelates of organic oligohydroxy compounds are discussed.

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