Application of [HMim][NTf2], [HMim][TfO] and [BMim][TfO] ionic liquids on the extraction of toluene from alkanes: Effect of the anion and the alkyl chain length of the cation on the LLE

Corderí, Sandra; González, Emilio J.; Calvar, Noélia; Domínguez, Ángeles

doi:10.1016/j.jct.2012.04.015

Cited by 56 publications

(29 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Gonzaĺez et al applied the NRTL and Universal-Quasi Chemical (UNIQUAC) thermodynamic models to correlate the equilibrium data of the mentioned ternary system. 11 Similar results were observed using 12 [BMim][MSO4], 13 [EMim][NTf2], and [EMpy][NTf2] 14 ILs. Some other ILs were used for extraction of toluene from aliphatics in the LLE process.…”

Section: Introductionsupporting

confidence: 76%

“…Figure 12 demonstrates that the distribution coefficient for ethylene glycol is higher than those for Also, the selectivity of prepared DES is higher than those of ethylene glycol and a lot of previously studied ILs. 6,[11][12][13][14]17 Therefore, it can be concluded that DES demonstrates great capacity for performing the extraction based on the selectivity values too.…”

Section: Depicted Plots Of Figures 2−5 Beside the Reported Values Of ...mentioning

confidence: 99%

See 1 more Smart Citation

Separation of Aromatics from a Cyclic-Aliphatic Hydrocarbon Using Ethylene Glycol and a Choline Chloride-Based Deep Eutectic Solvent

2021

View full text Add to dashboard Cite

The separation of aromatic and aliphatic hydrocarbons is a challenging process in the petrochemical industry. In this case, liquid–liquid extraction (LLE) by organic solvents has been widely applied in the industry. However, most of the used traditional solvents are toxic and volatile. In the present work, two non-volatile and environmentally friendly solvents were utilized to separate toluene (as an aromatic) from cyclohexane (cyclic aliphatic) in an LLE process. Ternary phase diagrams of cyclohexane–toluene–solvent [ethylene glycol/deep eutectic solvent (DES)] were determined at 298.15 and 308.15 K and atmospheric pressure. The distribution coefficient and selectivity of applied solvents for toluene were determined and compared with those of previously used ionic liquids (ILs). The results show that the prepared choline chloride–glycerol DES in the current work is an efficient solvent for the extraction of toluene. The selectivity of applied DES was greater than unity and even higher than 9 at low concentrations of the solute. These values are higher than those of all previously used ILs. Two thermodynamic models of NRTL and UNIQUAC were used for the correlation of equilibrium data with a root-mean-square deviation value less than 0.028. Therefore, the mentioned models can be applied successfully for the design of the extraction process using the investigated solvents.

show abstract

Section: Introductionsupporting

confidence: 76%

Section: Depicted Plots Of Figures 2−5 Beside the Reported Values Of ...mentioning

confidence: 99%

Separation of Aromatics from a Cyclic-Aliphatic Hydrocarbon Using Ethylene Glycol and a Choline Chloride-Based Deep Eutectic Solvent

2021

View full text Add to dashboard Cite

show abstract

“…For example, varying the substituents of the imidazolium ring drastically changes the physical properties of these ILs . Combining different cations and anions is another means of controlling the properties . The possibility to select the macroscopic properties by chosing the chemical structure and composition of an IL is the key for a rational design.…”

Section: Introductionmentioning

confidence: 99%

Clusters of the Ionic Liquid 1‐Hydroxyethyl‐3‐methylimidazolium Picrate: From Theoretical Prediction in the Gas Phase to Experimental Evidence in the Solid State

2018

View full text Add to dashboard Cite

Interonic interactions determine the macroscopic properties of ionic liquids (ILs). Hence, unravelling the relationships between the microscopic and macroscopic scales is key for rational design. Combining density functional theory (DFT) calculations of isolated ion pairs and vibrational spectroscopy of the condensed phase (fluid or solid) has become a very common approach. In the present work, we make a step towards understanding how the physicochemical effects in small gas phase clusters of a hydroxyl functionalized imidazolium-picrate IL relate with the molecular structure and interactions of the corresponding solid material taking 1-hydroxyethyl-3-methylimidazolium picrate, C OHmimPic, as an example. In the isolated ion pair, strong alkyl-OH⋅⋅⋅Pic hydrogen bonding interactions are found rather than the commonly observed hydrogen bonding interactions at the slightly acidic C(2)-H site of the imidazolium ring. However, this part of the cation plays an important role when clusters of ion pairs in the gas phase and inside a crystal lattice are considered. For example, in the dimeric ion-pair cluster, one centre (O*) with two interaction sites (C(2)-H-O* and alkyl OH-Pic) is observed. This configuration is suggested by single crystal X-ray diffraction (XRD), vibrational spectroscopy, and the dispersion-corrected DFT calculations. Hence, the study provides evidence for the appearance of theoretical gas phase clusters in an actual solidified ionic liquid. This ion pair dimer formation may be a general behavior of hydroxyl functionalized imidazolium ILs, but further research is needed to draw a final conclusion. Moreover, the Raman spectra confirm the exclusive gauche conformation of the hyroxyl functionalized alkyl chain.

show abstract

“…[6][7][8][9][10] These features have motivated the application of ILs to extraction/separation of Bz/Cy mixtures, through absorption and membrane processes over the past decade. [11][12][13][14][15][16][17][18][19] Although this eld has been in development since 2002 the use of ILs as extraction separation agents and supported ionic liquid membranes (SILMs) in industrial applications remains limited owing to certain drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Morphology and pervaporation performance of ionic liquid and waterborne polyurethane composite membranes

Tang

Hao

et al. 2018

RSC Adv.

View full text Add to dashboard Cite

show abstract

Application of [HMim][NTf2], [HMim][TfO] and [BMim][TfO] ionic liquids on the extraction of toluene from alkanes: Effect of the anion and the alkyl chain length of the cation on the LLE

Cited by 56 publications

References 38 publications

Separation of Aromatics from a Cyclic-Aliphatic Hydrocarbon Using Ethylene Glycol and a Choline Chloride-Based Deep Eutectic Solvent

Separation of Aromatics from a Cyclic-Aliphatic Hydrocarbon Using Ethylene Glycol and a Choline Chloride-Based Deep Eutectic Solvent

Clusters of the Ionic Liquid 1‐Hydroxyethyl‐3‐methylimidazolium Picrate: From Theoretical Prediction in the Gas Phase to Experimental Evidence in the Solid State

Morphology and pervaporation performance of ionic liquid and waterborne polyurethane composite membranes

Contact Info

Product

Resources

About