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

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.

Download Full-text

Fabrication of polyacrylonitrile hollow fiber membranes from ionic liquid solutions

Polymer Chemistry ◽

10.1039/c5py01344e ◽

2016 ◽

Vol 7 (1) ◽

pp. 113-124 ◽

Cited By ~ 23

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.

Download Full-text

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

Chemical Communications ◽

10.1039/c7cc09635f ◽

2018 ◽

Vol 54 (16) ◽

pp. 2056-2059 ◽

Cited By ~ 7

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.

Download Full-text

Borohydride Ionic Liquids and Borane/Ionic-Liquid Solutions as Hypergolic Fuels with Superior Low Ignition-Delay Times

Angewandte Chemie International Edition ◽

10.1002/anie.201309044 ◽

2014 ◽

Vol 53 (11) ◽

pp. 2969-2972 ◽

Cited By ~ 71

Author(s):

Songqing Li ◽

Haixiang Gao ◽

Jean'ne M. Shreeve

Keyword(s):

Ionic Liquid ◽

Ionic Liquids ◽

Ignition Delay ◽

Ignition Delay Times ◽

Liquid Solutions ◽

Delay Times

Download Full-text

Phase Behavior and Thermodynamic Properties of Ionic Liquids, Ionic Liquid Mixtures, and Ionic Liquid Solutions

ChemInform ◽

10.1002/chin.200601269 ◽

2006 ◽

Vol 37 (1) ◽

Author(s):

L. P. N. Rebelo ◽

V. Najdanovic-Visak ◽

R. Gomes de Azevedo ◽

J. M. S. S. Esperanca ◽

M. Nunes da Ponte ◽

...

Keyword(s):

Ionic Liquid ◽

Ionic Liquids ◽

Thermodynamic Properties ◽

Phase Behavior ◽

Liquid Mixtures ◽

Liquid Solutions

Download Full-text

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

Green Chemistry ◽

10.1039/c4gc01476f ◽

2015 ◽

Vol 17 (2) ◽

pp. 1001-1007 ◽

Cited By ~ 16

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.

Download Full-text

Dissolution of Amyloid Aggregates in Aqueous Ionic Liquid Solutions: A Case Study of Insulin Amyloid

Australian Journal of Chemistry ◽

10.1071/ch18361 ◽

2019 ◽

Vol 72 (2) ◽

pp. 81 ◽

Cited By ~ 4

Author(s):

Takahiro Takekiyo ◽

Yuka Ishikawa ◽

Erika Yamaguchi ◽

Natsuki Yamada ◽

Yukihiro Yoshimura

Keyword(s):

Ionic Liquid ◽

Hydrogen Bonding ◽

Ionic Liquids ◽

Bovine Insulin ◽

Future Design ◽

Amyloid Aggregates ◽

Liquid Solutions ◽

The Difference ◽

Β Sheet

Dissolution of amyloid aggregates with high β-sheet content is required for the correct refolding of ordered protein aggregates. The dissolution of bovine insulin amyloid aggregates in five different ionic liquids (ILs) is investigated. These were comprised of three 1-butyl-3-methylimidazolium ([bmim])-based ILs, containing either SCN−, NO3−, or Cl− anions, and two alkylammonium nitrate-based ILs, ethyl- and propylammonium nitrate (EAN and PAN). A broad IL concentration range (x=0–30mol-% IL) was analysed using FTIR spectroscopy combined with the Congo red assay. On the whole, the [bmim]-based ILs showed a higher dissolution ability than EAN and PAN for all concentrations of x. It is notable that the dissolution ability of dilute aqueous IL solutions (x<15) for insulin amyloid was different to that of concentrated aqueous IL solutions (x>15). The former condition for insulin amyloid may affect dissolution based on the denaturant effect of cations and anions in the ILs. The latter condition may affect this dissolution based on the hydrogen-bonding ability (α and β values) of the ILs, as described by the Kamlet–Taft parameters. Moreover, the difference between these α and β values (α–β) was found to be a good indicator of the dissolution ability of ILs for insulin amyloid aggregates in concentrated conditions above x=20 (α–β<0, strong dissolution ability; α–β>0, weak dissolution ability). These findings may assist the future design of aqueous IL-based dissolution agents for ordered aggregated proteins.

Download Full-text