Extraction Equilibria of Propionic Acid in Systems with Phosphonium Phosphinate Ionic Liquid, Dodecane, and Water

2021 ◽  
Vol 66 (2) ◽  
pp. 947-957
Author(s):  
Ján Marták ◽  
Kanti Kumar Athankar ◽  
Tibor Liptaj ◽  
Milan Polakovič ◽  
Štefan Schlosser
Keyword(s):  
Ionic Liquid ◽  
Propionic Acid ◽  
Extraction Equilibria

Tetracarboxyl-Functionalized Ionic Liquid: Synthesis and Catalytic Properties

2015 ◽  
Vol 68 (10) ◽  
pp. 1513 ◽  
Author(s):  
Miaona Feng ◽  
Guoying Zhao ◽  
Hongling Gao ◽  
Suojiang Zhang
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Ionic Liquids ◽  
Propionic Acid ◽  
Propylene Carbonate ◽  
Propylene Oxide ◽  
High Stability ◽  
Ammonium Acetate ◽  
Catalytic Properties ◽  
Potential Applications

Novel tetracarboxyl-functionalized 2,2′-biimidazolium-based ionic liquids (ILs) with different anions were synthesized in two steps from readily available and sustainable starting materials including ammonium acetate, glyoxal, and halogenated propionic acid. The functionalized IL exhibited higher catalytic activity towards the cycloaddition of CO2 to terminal epoxides. With propylene oxide as a substrate, the optimum yield of propylene carbonate reached 82.7 % at an initial CO2 pressure of 2.0 MPa for 4 h at 140°C. Moreover, the functionalized IL catalyst displayed a high stability and can be reused for at least five cycles without obvious loss of catalytic activity. The results provide a simple and economical way to synthesize multi-functionalized imidazolium-based ILs with versatile potential applications.

The phase envelopes of alternative solvents (ionic liquid, CO2) and building blocks of biomass origin (lactic acid, propionic acid)

2010 ◽  
Vol 295 (2) ◽  
pp. 177-185 ◽  
Author(s):  
Rafał Bogel-Łukasik ◽  
Dobrochna Matkowska ◽  
Małgorzata E. Zakrzewska ◽  
Ewa Bogel-Łukasik ◽  
Tadeusz Hofman
Keyword(s):  
Ionic Liquid ◽  
Lactic Acid ◽  
Propionic Acid ◽  
Building Blocks ◽  
Liquid Co2 ◽  
Alternative Solvents

scholarly journals Cellulose dissolution and regeneration using a non-aqueous, non-stoichiometric protic ionic liquid system

Cellulose ◽  
2020 ◽  
Vol 27 (16) ◽  
pp. 9593-9603
Author(s):  
Laura Berga ◽  
Isobel Bruce ◽  
Thomas W. J. Nicol ◽  
Ashley J. Holding ◽  
Noriyuki Isobe ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Propionic Acid ◽  
Average Molecular Weight ◽  
Gel Permeation Chromatography ◽  
Liquid System ◽  
Molar Ratio ◽  
Protic Ionic Liquid ◽  
Equimolar Composition ◽  
Time Period ◽  
Short Period

AbstractThe solubility of cellulose has been studied as a function of composition in the binary mixture of 1,1,3,3-tetramethylguanidine and propionic acid. In amine-rich compositions, greater quantities of cellulose can be dissolved than in the equimolar composition, a.k.a. the protic ionic liquid [TMGH][OPr]. By applying a methodology of a short period of heating followed by cooling, similar concentrations of cellulose can be achieved in a much shorter time period. Finally, regeneration of cellulose from solution can be achieved by altering the acid:amine molar ratio. In comparison to cellulose regenerated from these solutions using water as an antisolvent, cellulose regenerated with propionic acid exhibit a lower crystallinity as inferred from x-ray diffractometry, but a greater average molecular weight as inferred from gel permeation chromatography.

Solid-Liquid Equilibrium in the Systems with an Ionic Liquid

2008 ◽  
Vol 73 (5) ◽  
pp. 657-664 ◽  
Author(s):  
Zuzana Sedláková ◽  
Hélène Sauton ◽  
Vladimír Hynek ◽  
Ivona Malijevská
Keyword(s):  
Ionic Liquid ◽  
Acetic Acid ◽  
Binary System ◽  
Propionic Acid ◽  
Solid Phase ◽  
Ternary Systems ◽  
Liquid Equilibrium ◽  
Solid Compound ◽  
Active Interest ◽  
Solid Liquid

An active interest in ionic liquids has grown over the last years. This relatively new class of solvents appears to be potentially useful as a "greener" alternative to volatile organic compounds. This work was aimed at studying the effect of addition of the ionic liquid 1-butyl-3-methylimidazolium chloride to two systems (acetic acid (1)-formamide (2) and propionic acid (1)-formamide (2)) on formation of a compound in the solid phase. In previous work, the presence of a solid compound with a formula (CH3COOH)2·HCONH2 was investigated in the binary system acetic acid (1)-formamide (2) and a stable solid compound with a different formula CH3CH2COOH·(HCONH2)2 was found in the binary system propionic acid (1)-formamide (2). In both cases the compound formation is attributed to a strong cross-association (O···H···N). Solid-liquid equilibrium of the systems measured in this work was determined from time-temperature warming curves. In both measured ternary systems with a small addition of the ionic liquid 1-butyl-3-methylimidazolium chloride (i.e. the systems acetic acid (1)-formamide (2)-1-butyl-3-methylimidazolium chloride (3) and propionic acid (1)-formamide (2)-1-butyl-3-methylimidazolium chloride (3)) the above mentioned stable solid compounds are formed and the corresponding melting temperature of these compounds decreased. Dissociation parameters were modelled thermodynamically for solid adducts.

Soft ionic liquid based resistive memory characteristics in a two terminal discrete polydimethylsiloxane cylindrical microchannel

2020 ◽  
Vol 8 (38) ◽  
pp. 13368-13374
Author(s):  
Muhammad Umair Khan ◽  
Gul Hassan ◽  
Jinho Bae
Keyword(s):  
Ionic Liquid ◽  
Acrylic Acid ◽  
Sodium Hydroxide ◽  
Sodium Salt ◽  
Resistive Memory ◽  
Cylindrical Microchannel ◽  
Memory Characteristics ◽  
Poly Acrylic Acid

This paper proposes a novel soft ionic liquid (IL) electrically functional device that displays resistive memory characteristics using poly(acrylic acid) partial sodium salt (PAA-Na+:H2O) solution gel and sodium hydroxide (NaOH) in a thin polydimethylsiloxane (PDMS) cylindrical microchannel.

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