Salting-out effect on extraction of phenol from aqueous solutions by [Hmim][NTf2] ionic liquid: Experimental investigations and modeling

Asrami, Mahdieh Razi; Saien, Javad

doi:10.1016/j.seppur.2018.04.075

Cited by 28 publications

(18 citation statements)

References 41 publications

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“…The mass fraction of components in each phase was determined based on the cloud point method and refractive index measurement, as described in previous studies. , In this regard, a 5 cm 3 miniature cell equipped with a magnetic stirrer and with isothermal fluid jacket was used. The temperature was regulated at specified values by means of a circulating distilled water between thermostat (Julabo, Germany), the miniature cell jacket, and the refractometer.…”

Section: Methodsmentioning

confidence: 99%

Temperature and Salt Effects on the Liquid–Liquid Equilibrium of the Water + Cyclopentanone + (Propan-2-yl) Benzene System

et al. 2020

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The separation of cyclopentanone from aqueous solutions with recommended (propan-2-yl) benzene (cumene) solvent was investigated at different temperatures of 293.2, 298.2, and 308.2 K and with the effect of NaCl, Na 2 SO 4 , and MgSO 4 salts. In a wide mass fraction range of cyclopentanone, the solute distribution coefficients and separation factors were within (1.554−5.992) and (75.85−1944.97), respectively. The high separation factors corresponded to low solute concentrations and low temperatures. The effect of salts was investigated, and enhancements in the separation factor were achieved up to 24.7, 39.9, and 49.3% with 0.01 mass fraction of, respectively, NaCl, Na 2 SO 4 , and MgSO 4 in an aqueous phase. This order of salt effectiveness is consistent with the Gibbs free energy for the hydration of the constituent ions. The consistency of LLE data for the employed system, with and without salts, was ascertained with corresponding equations. For the modeling of obtained data, the well-known activity coefficient models of NRTL and UNIQUAC were used, and binary interaction parameters were determined. High accuracy of the models was revealed with root-mean-square deviations of less than 0.0053 and 0.0069, respectively.

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Section: Methodsmentioning

confidence: 99%

Temperature and Salt Effects on the Liquid–Liquid Equilibrium of the Water + Cyclopentanone + (Propan-2-yl) Benzene System

et al. 2020

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“…The refractive index was applied to determine the mass fraction of components in the aqueous and organic phases. In this regard, the cloud-point method was used as described in previous works. , For this aim, a 5 cm 3 miniature cell, connected to a magnetic stirrer and with an isothermal fluid jacket was used. To control temperature, distilled water was circulated between thermostat (Julabo, Germany), the cell jacket, and the refractometer used to measure refractive index.…”

Section: Methodsmentioning

confidence: 99%

“…The range of pH was 4.48–6.98, which is lower than the ionization constant (p K a ) of phenol (9.96). Consequently, by salts addition, phenol keeps its molecular structure. , …”

Section: Methodsmentioning

confidence: 99%

“…Study on the liquid–liquid equilibrium with salt effect is important in separation and unit operations since salts can enhance solute extraction. Recently, the effect of salts on the equilibrium of water + phenol + solvent has been studied. , It has been revealed that salts can improve extraction of phenol from water. However, it is important to find an optimum salt concentration considering the extraction efficiency and economic parameters in operations, i.e., limited separation time or lower number of required stages to reach a certain separation in the presence of salts.…”

Section: Introductionmentioning

confidence: 99%

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Salt Effects on Liquid–Liquid Equilibria of Water + Phenol + (Propan-2-yl) Benzene + Salts Systems

Asrami

Saien

2019

J. Chem. Eng. Data

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The effect of three dissolved salts, namely, sodium chloride, sodium sulfate, and magnesium sulfate, on the liquid–liquid equilibrium of phenol extraction from aqueous phase by (propan-2-yl) benzene (cumene) was investigated at the temperature of 298.2 K and the ambient pressure of 81.5 kPa. Salts with mass fractions of 0.005 and 0.020 in water were used and significant enhancement in the phenol extraction was achieved compared to salt-free system. Results showed that the presence of salts caused the solute separation factor to reach as (46.29 and 95.81)% with NaCl, (63.52 and 165.19)% with Na2SO4, and (86.39 and 238.55)% with MgSO4, related to the used low and high salt concentrations. Therefore, the salting-out effect appeared in the order MgSO4 > Na2SO4 > NaCl, in agreement with the Hofmeister series. The Eisen–Joffe equation confirmed the consistency of experimental tie-line data. To correlate the obtained data, the well-known NRTL and UNIQUAC thermodynamic models were satisfactorily used and the maximum root-mean-square deviations were as low as 0.0071 and 0.0013 for these models, respectively.

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“…The reagents were used as received without further purification. Density data found in the literature for the pure studied chemicals at 298.15 K are also included in this table. ,− …”

Section: Methodsmentioning

confidence: 99%

Extraction of Carboxylic Acids from Aqueous Solutions by Using [BMim][NTf₂] and Salting-out Agents

et al. 2019

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Levulinic and lactic acids are important feedstock in a wide range of different industries such as polymer, pharmaceutical, or food manufacture. In this work, a study about levulinic acid and lactic acid recovery from their aqueous solutions was carried out using the hydrophobic ionic liquid (IL) 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonil)imide, [BMim][NTf 2 ]. Liquid−liquid equilibria data for the ternary systems water + levulinic acid or lactic acid + IL were determined. The obtained experimental data were correlated by using the nonrandom two-liquid (NRTL) equation. An analysis of the influence of the acid structure and the addition of salting-out agents (potassium phosphate, ammonium sulfate, and saccharose) on the phase equilibria, was also carried out. [BMim][NTf 2 ] was found to be a good extractant for the recovery of levulinic acid and the extraction process was improved by the addition ammonium sulfate.

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Salting-out effect on extraction of phenol from aqueous solutions by [Hmim][NTf2] ionic liquid: Experimental investigations and modeling

Cited by 28 publications

References 41 publications

Temperature and Salt Effects on the Liquid–Liquid Equilibrium of the Water + Cyclopentanone + (Propan-2-yl) Benzene System

Temperature and Salt Effects on the Liquid–Liquid Equilibrium of the Water + Cyclopentanone + (Propan-2-yl) Benzene System

Salt Effects on Liquid–Liquid Equilibria of Water + Phenol + (Propan-2-yl) Benzene + Salts Systems

Extraction of Carboxylic Acids from Aqueous Solutions by Using [BMim][NTf₂] and Salting-out Agents

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Salting-out effect on extraction of phenol from aqueous solutions by [Hmim][NTf2] ionic liquid: Experimental investigations and modeling

Cited by 28 publications

References 41 publications

Temperature and Salt Effects on the Liquid–Liquid Equilibrium of the Water + Cyclopentanone + (Propan-2-yl) Benzene System

Temperature and Salt Effects on the Liquid–Liquid Equilibrium of the Water + Cyclopentanone + (Propan-2-yl) Benzene System

Salt Effects on Liquid–Liquid Equilibria of Water + Phenol + (Propan-2-yl) Benzene + Salts Systems

Extraction of Carboxylic Acids from Aqueous Solutions by Using [BMim][NTf2] and Salting-out Agents

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Product

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Extraction of Carboxylic Acids from Aqueous Solutions by Using [BMim][NTf₂] and Salting-out Agents