Properties of pure 1-methylimidazolium acetate ionic liquid and its binary mixtures with alcohols

Wu, Qian; Xu, Yingjie; Zhu, Hongye; Yu, Chaohong

doi:10.1016/j.jct.2012.01.013

Cited by 100 publications

(42 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For both ILs viscosities decrease when increasing temperature and water concentration as described in literature [4,8,9,13,14,[16][17][18].…”

Section: Resultsmentioning

confidence: 99%

“…Rodríguez and Brennecke [22] found negative deviation for C 2 mim Ethylsulphate (except at T > 338 K and high water content that were slightly positive) and C 2 mim Trifluoroacetate and for C 2 mim Triflate positive deviations except for T < 288.15 K at high water concentrations that were negative. Qian et al [14] found negative excess volumes up to À1 cm 3 Á mol À1 for methanol in mixtures (alcohols + mimAc), for methanol, ethanol and 1-propanol and slightly positive for 1-butanol at very low IL concentration. Thus excess molar volumes are larger for alcohols able to form stronger hydrogen bonds with the IL, forming a better packing.…”

Section: Excess Molar Volumesmentioning

confidence: 99%

“…Qian et al [14] determined densities and viscosities of 1-methylimidazolium acetate IL and its binary mixtures with alcohols. Araujo et al [15] determined viscosities of C 2 mimAc with nucleic acid bases.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of water concentration in the viscosities and densities of cellulose dissolving ionic liquids. Correlation of viscosity data

Parra

Zambrano

Bermejo

et al. 2015

The Journal of Chemical Thermodynamics

View full text Add to dashboard Cite

a b s t r a c tThe densities and viscosities of aqueous mixtures of two cellulose dissolving ionic liquids: 1-allyl-3-methylimidazolium chloride and 1-ethyl-3-methyl imidazolium acetate ionic liquids have been experimentally determined for water concentration up to approx. 35% water at atmospheric pressure and temperature range from (298.15 to 373.15) K. Molar excess volumes were calculated, resulting in negative values. Literature viscosity correlations were modified in order to describe the viscosity as a function of temperature and water concentration for both water concentrations lower than x H 2 O = 0.4 and for all the water concentration range. These modified equations were applied to correlate viscosity of (water + -ionic liquid) viscosity data for other 1-alkyl-3-methylimidazolium chloride ionic liquids as well as for (ethanol + 1-ethyl-3-methyl imidazolium acetate) from literature obtaining a good reproducibility of the data.

show abstract

“…For both ILs viscosities decrease when increasing temperature and water concentration as described in literature [4,8,9,13,14,[16][17][18].…”

Section: Resultsmentioning

confidence: 99%

Section: Excess Molar Volumesmentioning

confidence: 99%

See 1 more Smart Citation

Influence of water concentration in the viscosities and densities of cellulose dissolving ionic liquids. Correlation of viscosity data

Parra

Zambrano

Bermejo

et al. 2015

The Journal of Chemical Thermodynamics

View full text Add to dashboard Cite

show abstract

“…The dynamic viscosity exhibited in Figure 3, for instance at 298. 15 Figure 3 are plotted as ln η vs 1/T for a clearer perception of the data. The viscosity increases with the alkyl side chain length increase in 1-alkyl-3-methylimidazolium acetate ILs.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Thermophysical Properties of Five Acetate-Based Ionic Liquids

et al. 2012

View full text Add to dashboard Cite

Ionic liquids (ILs) with improved hydrogen-bonding acceptor abilities, such as acetate-based compounds, have shown great potential for CO 2 capture and biomass dissolution. In this context, the knowledge of the thermophysical properties of acetate-based fluids is essential for the design and scale-up of related processes. However, at this stage, acetate-based ILs are still poorly characterized. In this work, four thermophysical properties, specifically, density, viscosity, refractive index, and surface tension, were determined for five acetate-based ILs. Both protic and aprotic ILs were investigated, namely, N,N-dimethyl-N-ethylammonium acetate, 1-ethylimidazolium acetate, 1-ethyl-3-methylimidazolium acetate, 1-butyl-3-methylimidazolium acetate, and 1-butyl-1-methylpyrrolidinium acetate. From the temperature dependence of the measured properties, additional properties, such as the isobaric thermal expansion coefficient, the surface entropy and enthalpy, and the critical temperature, were further estimated. ■ INTRODUCTIONDuring the past decade research has emerged in various areas involving ionic liquids (ILs), and their potential applications are nowadays widespread. Ionic liquids are a group of molten salts normally composed of inorganic or organic anions, and relatively large organic cations, which do not easily form an ordered crystal and, therefore, they remain liquid at or near room temperature. 1−3 Recently, certain classes of ILs with improved hydrogenbonding acceptor capability, such as acetate-based fluids, have shown to be promising solvents for CO 2 capture 4−7 and cellulose and/or biomass dissolution. 8−11 Acetate-based fluids are able to strongly coordinate with CO 2 and hydrogen bond donator groups, such as −OH groups, and favorable results have thus been published. Moreover, acetate-based ILs present low toxicity, low corrosiveness, and favorable biodegradability. 12 Despite their undeniable interest, the thermophysical properties of acetate-based fluids are still poorly characterized. In a previous work we have determined the densities and viscosities of a series of imidazolium-based ILs which have shown potential for the dissolution of biomass. 13 Fendt et al. 14 presented the viscosities of acetate-based ILs and some of their mixtures with water and organic solvents. Qian et al. 15 explored the densities and viscosities of the protic IL 1-methylimidazolium acetate and its binary mixtures with alcohols. Additional scarce reports have addressed the measurements of densities, 16−18 viscosities, 19 refractive index, 16,20 and surface tension 18 of aprotic acetate-based ILs.In this work, the thermophysical properties of acetate-based ILs, specifically density, viscosity, refractive index, and surface tension, were measured as a function of temperature. The ILs are formed by the common anion acetate, combined either with protic (N,N-dimethyl-N-ethylammonium and 1-ethylimidazolium) or aprotic cations (1-ethyl-3-methylimidazolium, 1-butyl-3-methylimidazolium and 1-butyl-1-methylpyrrolydinium). Additio...

show abstract

“…The pseudo-binary gasoline+alcohol mixtures were prepared at room temperature for various volume fractions, in order to cover the entire composition range. 3 ) 0.7919 0.8034 0.7909 [13] 0.7950 [14] 0.7851 0.7855 [15] 0.7853 [16] 0.8102 0.8101 [17] 0.8097 [13] Dynamic viscosity at 40 o C (mPa•s) 0.3673 0.9081 0.829 [18] 0.837 [19] 1.3236 1.3470 [16] 1.3500 [20] 1.7769 1.7696 [21] Refractive index at 20 o C 1.4520 1.3624 1.362 [22] 1.3766 1.3750 [23] 1.3752 [24] 1.3991 1.3950 [22] 1.3991 [25] The experimental uncertainty in volume fraction was estimated to be less than ±0.002. The mixtures were prepared in airtight narrow-mouth ground glass stoppered bottle, in order to minimize the evaporative losses.…”

Section: Methodsmentioning

confidence: 99%

Study of the refractive index of gasoline+alcohol pseudo-binary mixtures

Nita

Geacai

Iulian

et al. 2017

Ovidius University Annals of Chemistry

View full text Add to dashboard Cite

Abstract. The properties of gasoline change as a result of blending with a bioalcohol, affecting the behavior of the pseudo-binary system. The aim of this paper is to present experimental data of the refractive index for pseudobinary mixtures of a reformate gasoline with ethanol, isopropanol and n-butanol over the entire composition range and for temperature ranging from 293.15 K to 313.15 K. The accuracy of different equations to predict the refractive index of the mixtures was tested. The best prediction accuracy (the lower AAD) corresponded to Eykman and Lorentz-Lorenz mixing rules. A logarithmic equation proposed to correlate the refractive index with composition and temperature of gasoline+alcohol mixtures showed a good accuracy (the absolute average deviation AAD < 0.052%). The deviations in refractive index for investigated systems are negative over the entire composition range and at all investigated temperatures.

show abstract

Properties of pure 1-methylimidazolium acetate ionic liquid and its binary mixtures with alcohols

Cited by 100 publications

References 52 publications

Influence of water concentration in the viscosities and densities of cellulose dissolving ionic liquids. Correlation of viscosity data

Influence of water concentration in the viscosities and densities of cellulose dissolving ionic liquids. Correlation of viscosity data

Thermophysical Properties of Five Acetate-Based Ionic Liquids

Study of the refractive index of gasoline+alcohol pseudo-binary mixtures

Contact Info

Product

Resources

About