Phase equilibria of (water+propionic acid or butyric acid+2-methoxy-2-methylpropane) ternary systems at 298.2K and 323.2K

Luo, Liejin; Liu, Dong; Li, Libo; Chen, Yun

doi:10.1016/j.fluid.2015.06.003

Cited by 27 publications

(21 citation statements)

References 23 publications

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“…The non-randomness parameter ߙ (ߙ = ߙ ) was fixed at 0.21 for each binary pair (݅-݆), which are commonly used [49][50][51][52] for simplifying the computation effectively. NRTL parameters g were determined by minimizing of Eq.…”

Section: Ternary Phase Diagram For the Oiling-out Systemmentioning

confidence: 99%

Process Design for Antisolvent Crystallization of Erythromycin Ethylsuccinate in Oiling-out System

Yin

Zhang

et al. 2016

Ind. Eng. Chem. Res.

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The crystallization process of erythromycin ethylsuccinate in a tetrahydrofuranwater system was investigated. Results show that oiling out occurs under several conditions; hence, a phase diagram with a liquid-liquid equilibrium area was established experimentally. For improved understanding of oiling-out crystallization, a series of in-situ tools, including FBRM, ATR-FTIR, and PVM, were applied to monitor the oiling-out phenomenon and the subsequent nucleation of erythromycin ethylsuccinate. SEM images were employed to analyze the influence of oiling out on the properties of the final crystals. The nucleation mechanism of erythromycin ethylsuccinate differs significantly depending on the location of the line of operation.The combination of cooling method and anti-solvent crystallization can be achieved with fundamental data of the phase diagram to suppress the oiling out phenomenon and obtain crystal products with high quality. The ternary phase diagram is of great importance in the process design of anti-solvent crystallization for an oiling-out system.

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Section: Ternary Phase Diagram For the Oiling-out Systemmentioning

confidence: 99%

Process Design for Antisolvent Crystallization of Erythromycin Ethylsuccinate in Oiling-out System

Yin

Zhang

et al. 2016

Ind. Eng. Chem. Res.

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“…To ascertain the thermodynamic consistency of experimental LLE tie-line data, we used the well-known Othmer–Tobias equation. ,− The expression of this equation is given below: where w represents the mass fraction. While the superscripts I and II denote the organic-rich phase and aqueous-rich phase, respectively, the subscripts 1 and 3 are for 1,4-dioxane and [TMA][EPPS], respectively.…”

Section: Resultsmentioning

confidence: 99%

Application of Buffer-Based Ionic Liquid in the Separation of 1,4-Dioxane from Its Azeotropic Aqueous Solution

2018

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We have found that the ionic liquid (IL) [TMA][EPPS] could induce liquid−liquid phase splitting in the aqueous solution of 1,4-dioxane at ambient conditions. This IL is composed of tetramethylammonium (TMA) as a cation and a biological buffer, 4-(2-hydroxyethyl)-1-piperazinepropanesulfonic acid (EPPS), as an anion. The efficiency of this buffer-based IL for separating 1,4-dioxane from its aqueous solution has been evaluated on the basis of the liquid−liquid equilibrium (LLE) and solid−liquid−liquid equilibrium (SLLE) data of 1,4-dioane + water + [TMA][EPPS] at 298.15 K and under atmospheric pressure. The experimental LLE phase boundary data were correlated with an empirical equation and the effective excluded volume (EEV) model, respectively. The consistency of the LLE tie-line data was confirmed by using the Othmer−Tobias model. The binary interaction parameters of the NRTL model for each pair were obtained by correlating the experimental LLE and SLLE tie-line data. By using [TMA][EPPS] as an auxiliary agent, the maximum concentrations of 1,4-dioxane (97.8 wt %) in the organic-rich phase is greater than the azeotropic compositions (87.82 wt %) of the corresponding aqueous system. It clearly indicates that [TMA][EPPS] can be served as a high efficiency, noncorrosive, and biocompatible green agent for recovering high purity of 1,4-dioxane from its aqueous solution.

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“…Propanoic acid is one of the most used organic acids in industry, and its recovery from dilute solutions is very important in the chemical fermentation industry. In order to specify solvents for providing operative extraction, many studies have been performed. − …”

Section: Introductionmentioning

confidence: 99%

Phase Equilibrium Study of the Aqueous Solution of Propanoic Acid with Acetates at Different Temperatures

2021

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Ternary phase behavior of water + propanoic acid + 3-methylbutyl acetate and water + propanoic acid + propan-2-yl acetate ternary mixtures including solubility and tie-line data was defined at (298.15 to 318.15) K under the pressure of 83.4 ± 1 kPa. The compositions of tie-line and bimodal curves were obtained by refractive index measurements. The phase diagrams show the type-1 behavior of liquid−liquid equilibrium (LLE). The capability of the solvents for the extraction of propanoic acid from aqueous solutions was determined by distribution coefficients and separation factors. The reliability of the experimental tie-line data was ascertained by Othmer−Tobias and Hand correlation equations. The tie-line data were correlated with nonrandom two-liquid (NRTL) and universal quasi-chemical (UNIQUAC) models. The binary interaction parameters of the models were reported. Excellent agreement was observed between the experimental data and the correlated values.

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Phase equilibria of (water+propionic acid or butyric acid+2-methoxy-2-methylpropane) ternary systems at 298.2K and 323.2K

Cited by 27 publications

References 23 publications

Process Design for Antisolvent Crystallization of Erythromycin Ethylsuccinate in Oiling-out System

Process Design for Antisolvent Crystallization of Erythromycin Ethylsuccinate in Oiling-out System

Application of Buffer-Based Ionic Liquid in the Separation of 1,4-Dioxane from Its Azeotropic Aqueous Solution

Phase Equilibrium Study of the Aqueous Solution of Propanoic Acid with Acetates at Different Temperatures

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