Experimental and modeling study of liquid phase equilibria for (water + phosphoric acid + sec-alcohols) systems

Gilani, A. Ghanadzadeh; Ahmadifar, S.; Taki, Touba

doi:10.1016/j.jct.2019.04.005

Cited by 18 publications

(14 citation statements)

References 46 publications

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“…The UNIQUAC binary interaction parameters were determined using the measured tie-line data. The model interaction parameters were calculated by optimizing a MATLAB fminsearch function. , A detailed explanation concerning the optimizing function was reported in our previous publication . The UNIQUAC parameters were optimized using the following equations where a ij and b ij (expressed in Kelvin) represent the energy interactions between an i – j pair of molecules.…”

Section: Resultsmentioning

confidence: 99%

“…The LLE data and phase behavior for the aqueous solutions of PA with several organic solvents have been reported in our previous publications. − In this work, the equilibrium data for the water + PA + carbonyl solvents ternary systems at three different temperatures 298.2, 308.2, and 318.2 K were measured and compared. The chosen carbonyl solvents with structural similarity were dipropyl ketone (DPK) and ethyl butyrate (EB), although they belong to the different class of ketone and ester.…”

Section: Introductionmentioning

confidence: 94%

“…64,65 A detailed explanation concerning the optimizing function was reported in our previous publication. 28 The UNIQUAC parameters were optimized using the following equations…”

Section: ■ Experimentalmentioning

confidence: 99%

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Comparative Study of Liquid–Liquid Equilibria for Aqueous Mixtures of Phosphoric Acid with Two Structurally Similar Carbonyl Compounds: Measurement and Correlation

2020

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This comparative study demonstrates the experimental liquid–liquid equilibrium (LLE) data for the aqueous mixtures of phosphoric acid with the two structurally similar carbonyl compounds (i.e., dipropyl ketone and ethyl butyrate) at T = 298.2, 308.2, and 318.2 K and p = 101.3 kPa. Despite the close structural similarity between them, however, they belong to different chemical classifications. Thus, the extractive features of the selected carbonyl solvents were analyzed and compared. Both the studied systems were displayed as Treybal’s type-1 liquid–liquid phase diagrams. The biphasic region was found to be larger for the system containing a less polar solvent (ethyl butyrate), but the acid distribution coefficient and selectivity values were almost similar for both the carbonyl solvents. The measured tie-line data were satisfactorily fitted by the UNIQUAC activity coefficient model. Values of the model binary interaction parameters were optimized using the MATLAB fminsearch function that applies the Nelder–Mead algorithm. The reliability of the experimental tie-line data was determined through the Othmer–Tobias plot. The LLE data and selectivities specify that both the carbonyl solvents were found to be promising extractants for the separation of phosphoric acid from its dilute aqueous solutions.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 94%

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Comparative Study of Liquid–Liquid Equilibria for Aqueous Mixtures of Phosphoric Acid with Two Structurally Similar Carbonyl Compounds: Measurement and Correlation

2020

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“…In continuation of our research on the thermodynamic and phase behavior of the ternary systems containing PA, − we present the equilibrium data (solubilities and tie-lines) along with the correlation of the LLE data for aqueous mixtures of PA with aromatic esters. In our previous papers, − the LLE data for aqueous solutions of PA in aliphatic esteric solvents at different temperatures were reported.…”

Section: Introductionmentioning

confidence: 99%

Measurement and Modeling of Liquid–Liquid Equilibria for Water–Phosphoric Acid–Aromatic Esters

2020

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Ternary liquid−liquid equilibrium (LLE) data were measured for the {water + phosphoric acid + aromatic esters (benzyl acetate, benzyl benzoate, dimethyl phthalate, and diethyl phthalate)} systems at T = 298.2 K and P = 101.3 kPa. Moreover, to investigate the effect of temperature on LLE behavior, the LLE measurement was performed for a ternary system of (water + phosphoric acid + benzyl acetate) at three different temperatures (298.2, 308.2, and 318.2) K and the above pressure as well. Among the studied ternary systems, only the phase diagram for the system containing benzyl acetate clearly displays type-1 LLE behavior. The quality of the tie-line data was checked through the Othmer−Tobias correlation equation. The experimental data were correlated using the UNIQUAC model. For all of the systems studied, the separation factors are larger than unity, which means that the chosen aromatic esters might have the potential to extract phosphoric acid from water. As the solubility of the acid in benzyl benzoate is poor and it might be hydrolyzed in water after having been rested for a while, it is not a suitable solvent in the recovery of the acid from water.

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“…Directives and Regulations control phosphates in water sources (Kırbaslar et al, 2006;Ghanadzadeh et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Liquid-Liquid Equilibria of the Phosphoric Acid, Ester and Water Ternary System

Jena¹,

Ghosh²,

Gupta³

et al. 2020

MGPB

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This paper presents an experimental methodology used for the determination of liquid-liquid equilibrium (LLE) data of the ternary system (phosphoric acid, ester and water). This experimental methodology represents the determination of phosphoric acid linked with different aquatic systems. In this study, an ester was selected as an organic solvent for the recovery of phosphoric acid from waste water. The binodal curve and the tie lines have been prominent. The ternary system (water + phosphoric acid + ester) was studied at three temperatures i.e. 25, 35 and 45 °C (298, 313 and 323 K). The results indicate that the extraction of phosphoric acid by a solvent is possible in aquatic systems. The results are discussed.

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Experimental and modeling study of liquid phase equilibria for (water + phosphoric acid + sec-alcohols) systems

Cited by 18 publications

References 46 publications

Comparative Study of Liquid–Liquid Equilibria for Aqueous Mixtures of Phosphoric Acid with Two Structurally Similar Carbonyl Compounds: Measurement and Correlation

Comparative Study of Liquid–Liquid Equilibria for Aqueous Mixtures of Phosphoric Acid with Two Structurally Similar Carbonyl Compounds: Measurement and Correlation

Measurement and Modeling of Liquid–Liquid Equilibria for Water–Phosphoric Acid–Aromatic Esters

Liquid-Liquid Equilibria of the Phosphoric Acid, Ester and Water Ternary System

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Experimental and modeling study of liquid phase equilibria for (water + phosphoric acid + sec-alcohols) systems

Cited by 18 publications

References 46 publications

Comparative Study of Liquid–Liquid Equilibria for Aqueous Mixtures of Phosphoric Acid with Two Structurally Similar Carbonyl Compounds: Measurement and Correlation

Comparative Study of Liquid–Liquid Equilibria for Aqueous Mixtures of Phosphoric Acid with Two Structurally Similar Carbonyl Compounds: Measurement and Correlation

Measurement and Modeling of Liquid–Liquid Equilibria for Water–Phosphoric Acid–Aromatic Esters

Liquid-Liquid Equilibria of the Phosphoric Acid, Ester and Water Ternary System

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Experimental and modeling study of liquid phase equilibria for (water + phosphoric acid + sec-alcohols) systems