Evaluation of [bmim][PF6] as an ionic solvent for the extraction of propylbenzene from aliphatic compounds

Fandary, Mohamed S.; Alkhaldi, Khaled H.A.E.; Al-Jimaz, Adel S.; Al-Rashed, Mohsen H.; AlTuwaim, Mohammad S.

doi:10.1016/j.jct.2012.05.010

Cited by 19 publications

(6 citation statements)

References 26 publications

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“…The experimental data were correlated to the UNIQUAC thermodynamic model of Abrams and Prausnitz. , The model gave an accurate representation of experimental LLE data in systems containing ionic liquids. − ,− …”

Section: Results and Discussionmentioning

confidence: 99%

“…Ionic liquids and paraffins have very low mutual solubility, and most ionic liquids are insoluble in paraffin-rich phases with paraffins > C 10 , producing a ready raffinate product without wasting any solvent. − The solubility of paraffin in the ionic-rich phase is also very low, reducing the cost of solvent regeneration by simple flash distillation or stripping . Ionic liquids are nonvolatile, which makes them environmentally attractive alternatives to conventional solvents that contaminate the atmosphere. − They also can be produced in a variety of anion–cation combinations, which allows optimization of the separation process. − …”

Section: Introductionmentioning

confidence: 99%

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Effect of Solvent Cation Alkyl-Chain Length on the Separation of Butylbenzene from n-Tetradecane Using Hexafluorophosphate-Based Ionic Liquids at (313.15 and 333.15) K and 101.3 kPa

2018

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The extraction of butylbenzene from n-tetradecane using three ionic solvents ([bmim][PF 6 ], [hmim][PF 6 ], and [omim][PF 6 ]) was studied at two temperatures (313.15 and 333.15 K) and under atmospheric pressure (101.3 kPa). Experimentally determined distribution coefficients (K) and solvent selectivities (S) were plotted against the mole fraction of butylbenzene in the solvent phase; improved results were obtained compared to the conventional solvent, sulfolane. The distribution coefficient and selectivity both increased with increasing alkyl chain length of the 1-alkyl-3-methylimidazolium moiety of the solvent cation. The universal quasichemical model was satisfactorily applied for correlating the experimental liquid−liquid equilibrium data of all three systems. Furthermore, comparison with literature results revealed that the distribution coefficients decreased with increasing paraffin carbon number.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Solvent Cation Alkyl-Chain Length on the Separation of Butylbenzene from n-Tetradecane Using Hexafluorophosphate-Based Ionic Liquids at (313.15 and 333.15) K and 101.3 kPa

2018

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“…In addition, many industrial processes favor the mixed solvents power due to the improvement of certain physical and extractive properties. − Consequently, using binary mixtures of ILs instead of using a single IL − would result in more favorable properties such as the distribution coefficient, selectivity, and viscosity. In our previous work, − [C 8 C 1 im][PF 6 ] showed a high distribution ratio and viscosity but low selectivity, whereas [C 2 C 1 im][CH 3 SO 4 ] showed a low distribution coefficient and low viscosity along with high selectivity. Therefore, [C 8 C 1 im][PF 6 ] and [C 2 C 1 im][CH 3 SO 4 ] ILs were used as a binary mixture to separate aromatics (propylbenzene, butylbenzene, or p -xylene) from aliphatic ( n -heptane) at 313.2 K and a pressure of 101.3 kPa.…”

Section: Introductionmentioning

confidence: 99%

Separation of Alkylbenzenes from n-Heptane Using Binary Mixtures of Ionic Solvents

et al. 2019

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A study of liquid–liquid extraction of alkylbenzenes (propylbenzene, butylbenzene, or p-xylene) from n-heptane using ionic solvent binary mixture of 1-octyl-3-methylimidazolium hexafluorophosphate [C8C1im][PF6] and 1-ethyl-3-methylimidazolium methylsulfate [C2C1im][CH3SO4] is conducted at 313.2 K and a pressure of 101.3 kPa. The distribution ratio and selectivity for systems under study were calculated and compared to systems including other solvents such as sulfolane and other ionic liquids. The use of the present binary mixture of ILs provided a higher mole-based distribution ratio than the use of sulfolane, a pure IL, and a mixture of other ILs. On the other hand, the use of [C8C1im][PF6] and [C2C1im][CH3SO4] mixture contributed to a mass-based distribution ratio comparable to that of sulfolane and a higher distribution ratio than the others involving ILs and led to a higher selectivity than all the other solvents including sulfolane. Hence the extractive properties of [C8C1im][PF6] and [C2C1im][CH3SO4] mixture revealed a potential substitute for other solvents. Furthermore, the nonrandom two-liquid model was utilized to assess the data.

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“…This research investigates the extraction of aromatics from petroleum refinery products, including gasoline, kerosene, diesel fuels, and lubricating oil. − The aliphatic compounds of interest are in the C 7 –C 17 range, and the aromatics include toluene, ethylbenzene, xylene, propylbenzene, and butylbenzene. The objective is to enhance the properties of the products by extracting these aromatics.…”

Section: Introductionmentioning

confidence: 99%

“…In previous works, − some ILs were evaluated for the separation of aromatics from paraffinic compounds at 313.15 K and an atmospheric pressure of 101 kPa. Stability in the presence of water (to avoid hydrolysis) and low viscosities were important properties that favored solvents based on alkyl sulfate anions .…”

Section: Introductionmentioning

confidence: 99%

Liquid Extraction of Toluene from Heptane, Octane, or Nonane Using Mixed Ionic Solvents of 1-Ethyl-3-methylimidazolium Methylsulfate and 1-Hexyl-3-methylimidazolium Hexafluorophosphate

2018

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Liquid−liquid extractions of toluene from paraffin compounds, using binary ionic solvent mixtures of 1-hexyl-3methylimidazolium hexafluorophosphate [hmim][PF 6 ] and 1-ethyl-3-methylimidazolium methylsulfate [emim][CH 3 SO 4 ], have been examined at 313.15 K and an atmospheric pressure of 101 kPa. Based on the experimental liquid−liquid equilibrium data for the pseudoternary systems consisting of heptane, octane, or nonane + toluene + [hmim][PF 6 ] + [emim][CH 3 SO 4 ], the distribution ratios and selectivity values were calculated and compared to systems using pure ionic liquids or sulfolane. The results showed that the use of a binary mixture of [hmim][PF 6 ] + [emim][CH 3 SO 4 ] at a solvent mole fraction of 0.9 for [hmim][PF 6 ] improves both the toluene distribution ratio and the selectivity, with respect to those of sulfolane and other pure ionic solvents. Consequently, these mixed ionic liquids could be considered an environmentally benign alternative solvent for the aromatic extraction process. The experimental data were correlated by the nonrandom two-liquid (NRTL) model.

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Evaluation of [bmim][PF6] as an ionic solvent for the extraction of propylbenzene from aliphatic compounds

Cited by 19 publications

References 26 publications

Effect of Solvent Cation Alkyl-Chain Length on the Separation of Butylbenzene from n-Tetradecane Using Hexafluorophosphate-Based Ionic Liquids at (313.15 and 333.15) K and 101.3 kPa

Effect of Solvent Cation Alkyl-Chain Length on the Separation of Butylbenzene from n-Tetradecane Using Hexafluorophosphate-Based Ionic Liquids at (313.15 and 333.15) K and 101.3 kPa

Separation of Alkylbenzenes from n-Heptane Using Binary Mixtures of Ionic Solvents

Liquid Extraction of Toluene from Heptane, Octane, or Nonane Using Mixed Ionic Solvents of 1-Ethyl-3-methylimidazolium Methylsulfate and 1-Hexyl-3-methylimidazolium Hexafluorophosphate

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