Separation of benzene and hexane by solvent extraction with 1-alkyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide ionic liquids: effect of the alkyl-substituent length.

doi:10.1021/JP066377U

Paper

Separation of benzene and hexane by solvent extraction with 1-alkyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide ionic liquids: effect of the alkyl-substituent length.

Published Jan 30, 2007 · A. Arce, M. Earle, H. Rodríguez

The journal of physical chemistry. B

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195

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3

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Abstract

The influence of the alkyl-substituent chain in 1-alkyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide ionic liquids ([C(n)mim][NTf(2)], where n is the length of a linear alkyl chain) as solvents for the separation of benzene and hexane by liquid extraction was investigated. The liquid-liquid equilibrium (LLE) at 25 degrees C for the ternary systems ([C(n)mim][NTf(2)] + hexane + benzene), with n taking the values 4, 8, 10, and 12, were determined. These data were analyzed and compared to those previously reported for the system ([C(2)mim][NTf(2)] + hexane + benzene). The results show that short alkyl chains on the imidazolium cation of the ionic liquid lead to a better extractive separation of benzene and hexane, and reveal the influence of the relative degree of ordering in the ionic liquids on the extraction parameters.

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Short alkyl chains in 1-alkyl-3-methylimidazolium bis-(trifluoromethyl)sulfonyl-amide ionic liquids lead to better extraction of benzene and hexane, with the relative degree of ordering also influencing extraction parameters.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Paper

Separation of benzene and hexane by solvent extraction with 1-alkyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide ionic liquids: effect of the alkyl-substituent length.

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References

Citations

Energy-economic purification of n-hexane from low benzene concentrations via extractive distillation with propylene carbonate as solvent: A comparative study with liquid–liquid extraction processes

Using propylene carbonate in extractive distillation processes for separating n-hexane from low benzene concentrations results in significant energy and CO2 emission savings compared to conventional liquid-liquid extraction processes.

Hydrocarbon Extraction with Ionic Liquids.

Ionic liquids (ILs) have revolutionized hydrocarbon extraction processes, reducing solvent loss, product entrainment, and energy consumption while improving separation efficiency and reducing pollution.

Extraction of methylcyclohexane−toluene mixture using imidazolium ionic liquids

The study found that ionic liquid [HMim][TCB] is the most efficient extraction solvent for separating methylcyclohexane-toluene mixtures, with a 71% reduction in heat demand compared to other solvents tested.

Adaptive Ion‐Gel: Stimuli‐Responsive, and Self‐Healing Ion Gels

Adaptive ion gels can modulate their physical properties in response to environmental conditions, including thermal and light stimuli, and can self-heal mechanical damage.

Comparison of olefin/paraffin separation by ionic liquid and polymeric ionic liquid stationary phases containing silver(I) ion using one-dimensional and multidimensional gas chromatography.

Silver(I) ions in polymeric ionic liquids (PILs) exhibit higher olefin-retention strength but are less thermally stable than ionic liquids, improving olefin/paraffin separation in gas chromatography.

The Role of the Anion in Imidazolium-Based Ionic Liquids for Fuel and Terpenes Processing

Imidazolium-based ionic liquids with mixed anions show promising results for removing aliphatic hydrocarbons and contaminants from fuels, with selectivity depending on solute polarity.

Electrolytic Conductivity Measurements for Ten Ionic Liquids

Electrolytic conductivity increases with temperature in both pyrrolidinium and 1-(methyl)benzyl-3-alkyl imidazolium ionic liquids, decreasing as side chain length increases, resulting in increased viscosity.