scholarly journals Studies on the Solubility of Terephthalic Acid in Ionic Liquids

Molecules ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 80 ◽  
Author(s):  
Karolina Matuszek ◽  
Ewa Pankalla ◽  
Aleksander Grymel ◽  
Piotr Latos ◽  
Anna Chrobok
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Temperature Effect ◽  
Industrial Production ◽  
Terephthalic Acid ◽  
Liquid Structure ◽  
Environmentally Benign ◽  
Low Solubility ◽  
Solvent Properties

Low solubility of terephthalic acid in common solvents makes its industrial production very difficult and not environmentally benign. Ionic liquids are known for their extraordinary solvent properties, with capability to dissolve a wide variety of materials, from common solvents to cellulose, opening new possibilities to find more suitable solvents for terephthalic acid. This work presents studies on the solubility of terephthalic acid in ionic liquids, and demonstrates that terephthalic acid is soluble in ionic liquids, such as 1-ethyl-3-methylimidazolium diethylphosphate, 1-butyl-3-methylimidazolium acetate, and dialkylimidazolium chlorides up to four times higher than in DMSO. Additionally, the temperature effect and correlation of ionic liquid structure with solubility efficiency are discussed.

One Pot Three Component Synthesis of 9-arylpolyhydroacridine Derivatives in an Ionic Liquid Medium

2005 ◽  
Vol 2005 (9) ◽  
pp. 600-602 ◽  
Author(s):  
Yu-Ling Li ◽  
Mei-Mei Zhang ◽  
Xiang-Shan Wang ◽  
Da-Qing Shi ◽  
Shu-Jiang Tu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ammonium Acetate ◽  
Aromatic Aldehydes ◽  
Environmentally Benign ◽  
Reaction Conditions ◽  
One Pot ◽  
High Yields ◽  
Work Up ◽  
Ionic Liquid Medium

In this paper the preparation of 3,3,6,6-tetramethyl-9-aryl-1,2,3,4,5,6,7,8,9,10- decahydroacridin-1,8-dione derivatives from aromatic aldehydes, 5,5-dimethyl-1,3- cyclohexanedione and ammonium acetate in ionic liquids [bmim+][BF4-] is described. This new method has the advantages of easier work-up, milder reaction conditions, high yields and an environmentally benign procedure compared with other methods.

scholarly journals Ionic liquid promoted Diels-Alder Reaction between anthrone and maleimides

2010 ◽  
Vol 8 (2) ◽  
pp. 356-360 ◽  
Author(s):  
Nitin Mirgane ◽  
Sandip Kotwal ◽  
Anil Karnik
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Alder Reaction ◽  
Dual Role ◽  
Diels Alder ◽  
Environmentally Benign ◽  
Green Solvents ◽  
Imidazolium Ionic Liquid ◽  
Diels Alder Reaction

AbstractIonic liquids (IL) are gaining importance as green solvents. Imidazolium ionic liquid [bmim]+[Cl]−, an environmentally benign solvent, was found to promote the Diels-Alder reaction between anthrone and maleimides at room temperature with excellent yields. The ionic liquid played a dual role as solvent and catalyst.

Ionic Liquid Promoted Eco-friendly and Efficient Synthesis of Six-membered Npolyheterocycles

2018 ◽  
Vol 15 (8) ◽  
pp. 1124-1146 ◽  
Author(s):  
Navjeet Kaur
Keyword(s):  
Organic Chemistry ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Organic Solvents ◽  
Review Article ◽  
Environmentally Benign ◽  
Wide Range ◽  
Catalyzed Reactions ◽  
Metal Catalyzed ◽  
Reaction Media

Background: The synthesis of N-polyheterocycles by environmentally benign method is highly attractive but challenging proposition. New strategies have been developed for the preparation of polycyclic heterocycles in the last decades. In this review article, the synthesis of nitrogen containing six-membered polycyclic heterocyclic compounds is presented with the application of ionic liquids. This contribution focuses on the literature related to the total synthesis of six-membered N-polyheterocycles. Objective: Ionic liquids not only acted as environmentally benign reaction media but also as catalysts which afforded the very promising replacements of traditional molecular solvents in organic chemistry due to their stability, non-flammability, non-volatility and ease of recyclability. Ionic liquids are utilized in metal catalyzed reactions in place of organic solvents in the last years. It has attracted considerable attention in recent years. Ionic liquids acted as alternatives of organic solvents and these ILs are environment friendly. Conclusion: In the area of green chemistry ionic liquid assisted synthesis is a very promising technique which afforded a flexible platform for the formation of heterocycles. The influence of ILs on the development of efficient and new synthetic protocols over the last decade for the construction of N-polyheterocycles is featured in this review article. These synthetic strategies will continue to attract more attention and will find a wide range of applications in organic synthesis. In conclusion, ionic liquids assisted syntheses have become an efficient and powerful tool in organic chemistry quickly.

scholarly journals Influence of Ionic Liquid Structure on Supported Ionic Liquid Membranes Effectiveness in Carbon Dioxide/Methane Separation

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Iwona Cichowska-Kopczyńska ◽  
Monika Joskowska ◽  
Bartosz Dębski ◽  
Justyna Łuczak ◽  
Robert Aranowski
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Polyvinylidene Fluoride ◽  
Mechanical Stability ◽  
Liquid Structure ◽  
Contact Angles ◽  
Liquid Membranes ◽  
Supported Ionic Liquid ◽  
Polypropylene Membrane ◽  
Supported Ionic Liquid Membranes

This paper indicates the possibility of application of imidazolium ionic liquids immobilized in polymeric supports—supported ionic liquid membranes—in CO2separation from gaseous streams (e.g., biogas). Imidazolium salts containing alkyl fluoride anions, bis(trifluoromethylsulfonyl)imide and trifluoromethanesulfonate, selectively separating CO2were used. The permeability of CO2through membranes was investigated under gas pressure of 30 kPa and temperature range 283–298 K. Permeability values occurred to be higher for ionic liquids containing bis(trifluoromethylsulfonyl)imide anion. Moreover, CO2permeability exhibited an increase with increasing temperature for all investigated systems. Stability of supported ionic liquid membranes was studied. In total, polypropylene membrane revealed the best properties, mechanical stability and observed wettability of this support were better than for polyamide and polyvinylidene fluoride ones. Polyethersulfone supports showed similar contact angles; however, its mechanical stability was significantly lower. Obtained results allowed to evaluate the effectiveness of separation process using selected ILs and supports.

scholarly journals Penentuan Resistivitas Tak-Terkompensasi Cairan Ion Berbasis Imidazol dengan Metode EIS: Pengaruh Panjang Alkil dan Perbedaan Anion

2020 ◽  
Vol 11 (2) ◽  
pp. 106-112
Author(s):  
Aep Patah ◽  
Yulia Rachmawati ◽  
Riyadini Utari ◽  
Achmad Rochliadi
Keyword(s):  
Thermal Stability ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Electrochemical Impedance ◽  
High Viscosity ◽  
High Thermal Stability ◽  
Bode Plot ◽  
Ohmic Drop ◽  
Increasing Temperature ◽  
Solvent Properties

Ionic liquids have interesting properties because they have several advantages compared to conventional organic solvents, such as high thermal stability, high viscosity, good solvent properties, non-flammable, and non-volatile. In electrochemistry, ionic liquids can be used as solvents without the addition of electrolytes. However, ionic liquids still have resistivity properties (uncompensated resistance), thus ohmic drop measurements are needed for a potential correction. Imidazole-based ionic liquids, which are known for their high conductivity and commonly used as a solvent, have been measured of their resistivity as a function of temperature, and type of their cations/anions. Electrochemical Impedance Spectroscopy (EIS) method was chosen to measure the resistivity of ionic liquids and Bode plot was generated for the analysis of the results. The measured resistivities of ionic liquids are in the range of 420 to 1500 ohm. It is concluded that the resistivity of the imidazole-based ionic liquid is influenced by the size of their constituent ions, the viscosity, and the resistance is decreased with increasing temperature.

1,3-Dialkylimidazolium Dimethyl Phosphates – Effective Solvents and Catalysts for Condensation Reactions

2014 ◽  
Vol 52 (1-2) ◽  
pp. 41-48
Author(s):  
L. Anteina ◽  
A. Gaidule ◽  
A. Zicmanis
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Malonic Acid ◽  
Condensation Reaction ◽  
Ethyl Cyanoacetate ◽  
Liquid Structure ◽  
Reaction Rates ◽  
Condensation Reactions

Abstract We report the preparation, characterization and exploitation of 1,3-dialkylimidazolium dimethyl phosphates. Condensation reactions of benzaldehyde with ethyl cyanoacetate and with malonic acid were performed in these ionic liquids either in absence or in presence of other catalysts. The effect of ionic liquid structure on the condensation reaction rates and yields was discussed

Molecular Dynamics Simulations of Ionic Liquids: Influence of Polarization on IL Structure and Ion Transport

2008 ◽  
Vol 1082 ◽  
Author(s):  
Oleg Borodin
Keyword(s):  
Molecular Dynamics ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Condensed Phase ◽  
Wide Class ◽  
Md Simulations ◽  
Liquid Structure ◽  
Many Body ◽  
Polarizable Force Field ◽  
Dynamics Simulations

ABSTRACTMany-body polarizable force field has been developed and validated for a wide class of ionic liquids. Classical molecular dynamics (MD) simulations have been performed on 29 ionic liquids. This presentation will focus on ability of developed force fields to predict condensed phase properties and on understanding the influence of many-body polarizable interactions on the ionic liquid structure and transport.

scholarly journals Electroreduction of Copper Dichloride Powder to Copper Nanoparticles in an Ionic Liquid

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Tian Wu ◽  
Qing Huang ◽  
Wei Li ◽  
Gongxuan Chen ◽  
Xiaoling Ma ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Transition Metal ◽  
Electrochemical Reduction ◽  
Copper Nanoparticles ◽  
Transition Metal Ions ◽  
Practical Application ◽  
Metal Chlorides ◽  
And Behavior ◽  
Low Solubility

There were a large number of ionic liquids electrodeposition reported in the literature; but were still in the laboratory stage some problems in the practical application of electrodeposition remain such as easily reacted with moisture in the air (AlCl3ionic liquid), high cost, and corrosive (dialkylimidazolium cation andBF4−,PF6−ionic liquid). In addition to the above shortcomings, low solubility of many metal salts in ionic liquids limits the practical application. In order to solve the problem of low solubility, [Bmim]Cl could be added [Bmim]PF6, which could significantly increase the solubility of metal chlorides; this method could be commonly used in preparing metal electrochemical reduction of metal chlorides. Our study showed that adding cationic groups in hydroxyl ionic liquid could cause the good solubility of transition metal chlorides, such as CuCl2. Complexation of hydroxyl functional group and transition metal ions increased solubility, resulting in a larger deposition current density and surface electrochemical reduction of copper nanoparticles deposited on the metal Ni. The electroreduction mechanism and behavior of CuCl2in hydroxyl ionic liquid and the Cu nanoparticle formation mechanism were investigated based on a comparison between similar experiments in the ionic liquid.

scholarly journals An Efficient One-Pot Three-Component Synthesis of Novel Sulfanyl Tetrazoles Using Ionic Liquids

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Sankari Kanakaraju ◽  
Bethanamudi Prasanna ◽  
G. V. P. Chandramouli
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Product Yield ◽  
Significant Loss ◽  
Environmentally Benign ◽  
One Pot ◽  
Three Component Reaction ◽  
Phenacyl Bromides

An efficient, simple, and environmentally benign method for the synthesis of novel sulfanyl tetrazoles has been achieved by one-pot three-component reaction of phenacyl bromides/3-(2-bromoacetyl)coumarins with KSCN and NaN3using [Bmim]BF4ionic liquid. It could be reused and recycled for four runs without significant loss of product yield.

scholarly journals Brønsted acids in ionic liquids: how acidity depends on the liquid structure

2014 ◽  
Vol 16 (42) ◽  
pp. 23233-23243 ◽  
Author(s):  
Jade A. McCune ◽  
Peizhao He ◽  
Marina Petkovic ◽  
Fergal Coleman ◽  
Julien Estager ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Liquid Structure ◽  
Liquid Mixtures ◽  
Bronsted Acids ◽  
Bronsted Acid ◽  
Acceptor Number ◽  
Compositional Range ◽  
Brönsted Acid ◽  
Wide Compositional Range

Gutmann Acceptor Number (AN) values have been determined for Brønsted acid–ionic liquid mixtures, over a wide compositional range.

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