Synthesis of novel dicationic basic ionic liquids and its catalytic activities for biodiesel production

Fan, Mingming; Yang, Jing; Jiang, Pingping; Li, Sisi

doi:10.1039/c2ra22233g

Cited by 51 publications

(27 citation statements)

References 30 publications

(25 reference statements)

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“…18,44 We are aware of the fact that situation detected in MeOH solution could be different from the one occurring in the reaction mixtures. This colorimetric method has been applied by us and others, to assess the basicity of functionalised dicationic ILs.…”

Section: Resultsmentioning

confidence: 99%

Functionalised diimidazolium salts: the anion effect on the catalytic ability

2016

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aThe catalytic ability of some functionalised diimidazolium ionic liquids was tested using the Michael addition of malononitrile to t-chalcone as probe reaction. Diimidazolium salts characterized by the presence of 1-(1imidazolylmethyl)-3,5-di-[1-(3-octylimidazolylmethyl)]benzene cation and differing in the anion structure were used. Both mono-and dianions were employed and among these some chiral anions generally used as organocatalysts were taken into account. Data collected were analysed both as function of ionic liquids structure and basicity, evaluated using the Hammett basicity function. Although the use of chiral anions did not allow performing a stereochemical control of the reaction, data collected demonstrate the high catalytic ability of the functionalised salts. Indeed, high conversions and yields were obtained under mild conditions and in significantly shorter reaction times with respect to the ones so far reported for this reaction.

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Section: Resultsmentioning

confidence: 99%

Functionalised diimidazolium salts: the anion effect on the catalytic ability

2016

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“…The biodiesel produced by transesterification of vegetable oils or animal fats is a potential alternative fuel to diesel, given the limited resources of fossil fuels and its environmental concerns (Fan et al 2013). 1, 2-Bis(3-methylimidazolium-1-yl) ethylene imidazolide performed best for the synthesis of biodiesel from soybean oil, with a yield biodiesel of 99.6%, which was related to the basicity and miscibility properties of the IL.…”

Section: Conversion Of Biomass Into Biofuelsmentioning

confidence: 99%

Ionic liquids and supercritical carbon dioxide: green and alternative reaction media for chemical processes

Liu

Zhang

et al. 2016

Reviews in Chemical Engineering

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Ionic liquids (ILs) and supercritical CO 2 (scCO 2 ) are two promising types of reaction media for green chemical processes due to their unique properties. They can be integrated into chemical reactions as catalysts and solvents to develop green and environment-friendly processes. This review presents current research trends aiming to solve the major chemical engineering issues in light of a fundamental understanding of these media. Applications of these media in the petrochemical industry, biochemical engineering, and fine chemical production are reviewed, suggesting the challenges and directions of utilizing them for green processes prospectively. These recent explorations and successful examples of applications demonstrate that ILs and scCO 2 offer huge potential for novel and green chemical engineering processes.

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“…Therefore, basic ionic liquids will be more effective than acidic ionic liquids in glycone production under moderate conditions. Recently, basic ionic liquids have been applied widely in organic reactions as a basic catalyst (Chen et al, 2008;Fan et al, 2013). In the researches, Meindelsma et al (Meindelsma et al, 2005) pointed out that ionic liquids can separate aromatic hydrocarbons from mixtures of aromatic and aliphatic hydrocarbons, and Sun and Shi (Sun and Shi, 2012) indicated that basic ionic liquids of the imidazole anion can separate acidic compounds.…”

Section: Introductionmentioning

confidence: 98%

Simultaneous synergistic microwave–ultrasonic extraction and hydrolysis for preparation of trans-resveratrol in tree peony seed oil-extracted residues using imidazolium-based ionic liquid

Chen

Zhang²,

Zhang

et al. 2016

Industrial Crops and Products

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a b s t r a c tImidazolium-based ionic liquid-based microwave-ultrasonic synergistic simultaneous extraction and hydrolysis (IMUSEH) method was developed to obtain trans-resveratrol from tree peony (Paeonia rockii (S.G. Haw & Lauener) T. Hong & J.J. Li) seed oil-extracted residues, in which the basic ionic liquid aqueous solution was used for extraction and transformation of trans-resveratrol glycosides to free transresveratrol. Through comparison, 1-butyl-3-methylimidazolium imidazolide ([C 4 C 1 im]Im) was selected as a dual solvent-catalyst, which showed an excellent solvent effect and catalytic activity. After optimization by a factorial design and response surface methodology, a higher yield of trans-resveratrol (3.06 ± 0.12 mol/g) was obtained under optimal conditions (0.5 M [C 4 C 1 im]Im, 24 mL/g liquid-solid ratio, 25 min time, and 396 W microwave irradiation power). The developed technique was compared with ionic liquid-based microwave-assisted extraction and ionic liquid-based ultrasonic-assisted extraction based on first-order kinetic model and scanning electron microscopy, which highlighted the mechanism of the microwave-ultrasonic synergistic apparatus. Method validation studies showed that the proposed method can be used to prepare trans-resveratrol. The developed method showed promise in transforming glucoside to aglycone in plant materials.

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Synthesis of novel dicationic basic ionic liquids and its catalytic activities for biodiesel production

Cited by 51 publications

References 30 publications

Functionalised diimidazolium salts: the anion effect on the catalytic ability

Functionalised diimidazolium salts: the anion effect on the catalytic ability

Ionic liquids and supercritical carbon dioxide: green and alternative reaction media for chemical processes

Simultaneous synergistic microwave–ultrasonic extraction and hydrolysis for preparation of trans-resveratrol in tree peony seed oil-extracted residues using imidazolium-based ionic liquid

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