Liquid–Liquid Equilibria for Ternary Systems n-Hexane + 1-Hexene + Furfural (or N,N-Dimethylformamide) at 298.2, 308.2, and 318.2 K

Clean utilization of catalytically cracked diesel is of paramount importance in the industry. The separation of polycyclic aromatic hydrocarbons (PAHs) from catalytically cracked diesel can significantly reduce the content of aromatics and increase the cetane number to improve the quality of diesel. In this work, for extracting the PAH 1-methylnaphthalene from the model fluid catalytic cracking diesel, the liquid–liquid equilibrium phase behavior for the quaternary systems (n-decane + 1-tetradecene + 1-methylnaphthalene + sulfolane/dimethyl sulfoxide) were explored at 303.15, 323.15, and 343.15 K under 0.1 MPa. The separation performance was characterized by the separation factor and distribution coefficient. The results showed that sulfolane was a suitable extractant compared to DMSO. The reliability of the measured phase equilibrium data was evaluated by the Hand and Othmer–Tobias equations. The UNIQUAC and NRTL models were applied to fit the tie-line data of the investigated mixtures with the AARD and rmsd lower than 0.01. The intermolecular interaction was explored by the σ-profile analysis to compare the separation performance of sulfolane and DMSO.

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“…From Figures 8 and 9, all the values of R 2 are near to unity, indicating the reliability of the experimental LLE values. 30…”

Section: Lle Experimental Resultsmentioning

confidence: 99%

“…Table gives the constants of the equations and regression coefficients ( R 2 ). From Figures and , all the values of R 2 are near to unity, indicating the reliability of the experimental LLE values …”

Section: Results and Discussionmentioning

confidence: 99%

Liquid–Liquid-Phase Equilibrium for Quaternary Systems (n-Decane + 1-Tetradecene + 1-Methylnaphthalene + Sulfolane/Dimethyl Sulfoxide) for Separation of 1-Methylnaphthalene from FCC Diesel

Wang

Fan

et al. 2021

J. Chem. Eng. Data

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“…For LLE measurement, ternary mixtures (water + TFP + ZIF‐8‐PIL/IL) were prepared according to the literature 5,18 . The mixtures were prepared in a specific phase equilibrium glass vial 31 placed in a thermostatic water bath (SC‐15, Nanjing Shunma Instrument Equipment Co. Ltd). The volume of the vial was 20 mL and the precision of the thermostatic water bath was ±0.1 K. The mixture was agitated vigorously using a magnetic stirrer at 1000 rpm for 2 h. After that, the mixture was kept for 13 h to ensure the equilibrium state.…”

Section: Methodsmentioning

confidence: 99%

Comparative evaluation of liquid–liquid equilibria for extraction of 2,2,3,3‐tetrafluoro‐1‐propanol from water by a ZIF‐8‐porous ionic liquid

Fan

Wang

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND 2,2,3,3‐Tetrafluoro‐1‐propanol (TFP) is a benign solvent and widely used in the electronics industry as a cleaning agent. Because water and TFP can form an azeotropic mixture, it consumes energy to separate TFP from its aqueous mixtures using conventional distillation. RESULTS In this work, the zeolitic imidazolate framework‐8 porous ionic liquid (ZIF‐8‐PIL) and the ionic liquid (IL) N‐butyl pyridinium bis(trifluoromethyl sulfonyl) imide ([Bpy][NTf2]) are used as extractants to extract TFP from its aqueous solution. ZIF‐8‐PIL was synthesized by ZIF‐8 and IL [Bpy][NTf2]. The liquid–liquid equilibrium (LLE) data for the two systems (water + TFP + ZIF‐8‐PIL/IL) were determined at 298.15, 308.15 and 318.15 K under 101.3 kPa. The selectivity (S) and distribution coefficient (D) were examined to assess the extractive performance of ZIF‐8‐PIL and IL. The non‐random two‐liquid (NRTL) model was applied to fit the tie‐line data of the investigated mixtures. CONCLUSION The results demonstrate that ZIF‐8‐PIL is a suitable extractant to separate TFP with values of S and D greater than unity. The NRTL model has better correlation performance for the ternary systems with root mean square deviation lower than 0.01. The obtained parameters satisfy the minimum state of the mixed Gibbs free energy, which indicated that the model parameters are reliable. © 2021 Society of Chemical Industry (SCI).

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“…At 101.3 kPa, the experimental LLE data were obtained at 303.2, 313.2, and 323.2 K. The information of apparatus and means has been provided in previous papers. − First, the solvent (TCM or MIPK) and water, each weighing about 40 g, were loaded into a jacketed glass container and mixed for 4 h and then stabilized for at least 6 h. Next, FAL was added to the kettle several times (1–2 g each time) to determine different phase equilibrium points. A thermocouple thermometer was used to measure the temperature of each test system, with an accuracy of 0.1 K.…”

Section: Methodsmentioning

confidence: 99%

Liquid–Liquid Equilibrium Study of Ternary Systems of (Water + Furfuryl Alcohol + Solvents) at 303.2, 313.2, and 323.2 K

Yan

Han

et al. 2021

J. Chem. Eng. Data

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The liquid–liquid equilibrium (LLE) data of water + furfuryl alcohol + trichloromethane /methyl isopropyl ketone were determined at 303.2, 313.2, and 323.2 K under 101.3 kPa. The distribution coefficient (D) and separation factor (S) were evaluated for the separation effect of solvents. The nonrandom two-liquid and universal quasichemical models were used to correlate the experimental LLE data and obtain the binary interaction parameters. Meanwhile, the root mean square deviations and absolute average deviation of the two models did not exceed 0.0094 and 0.0066, respectively, which shows that the experimental LLE data can be accurately correlated through the two models. GUI-MATLAB was used to verify the consistency between the LLE data and the calculated binary interaction parameters. σ-Profiles were used to analyze the interaction between the molecules of each substance, further confirming the accuracy of the experimental results.

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Liquid–Liquid Equilibria for Ternary Systems n-Hexane + 1-Hexene + Furfural (or N,N-Dimethylformamide) at 298.2, 308.2, and 318.2 K

Cited by 14 publications

References 32 publications

Liquid–Liquid-Phase Equilibrium for Quaternary Systems (n-Decane + 1-Tetradecene + 1-Methylnaphthalene + Sulfolane/Dimethyl Sulfoxide) for Separation of 1-Methylnaphthalene from FCC Diesel

Liquid–Liquid-Phase Equilibrium for Quaternary Systems (n-Decane + 1-Tetradecene + 1-Methylnaphthalene + Sulfolane/Dimethyl Sulfoxide) for Separation of 1-Methylnaphthalene from FCC Diesel

Comparative evaluation of liquid–liquid equilibria for extraction of 2,2,3,3‐tetrafluoro‐1‐propanol from water by a ZIF‐8‐porous ionic liquid

Liquid–Liquid Equilibrium Study of Ternary Systems of (Water + Furfuryl Alcohol + Solvents) at 303.2, 313.2, and 323.2 K

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