Solubility and partition coefficient of p-toluic acid in p-xylene and water

Kong, Qingran; Cheng, Youwei; Bao, Xiuxiu; Wang, Lijun; Li, Xi

doi:10.1016/j.fluid.2012.12.009

Cited by 9 publications

(4 citation statements)

References 49 publications

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“…A superthermostatic water-circulator bath equipped with an advanced PID controlling system was adopted for maintaining temperature with an uncertainty of ±0.05 K. In addition, a mercury glass thermometer was used to monitor the equilibrium temperature. The feasibility and reliability of the experimental apparatus was recognized in our previous work. − …”

Section: Experimental Sectionmentioning

confidence: 94%

Solubilities of 2,6-Dimethylnaphthalene in Six Pure Solvents and Two Binary Solvent Systems

et al. 2019

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The solubility data of 2,6-dimethylnaphthalene (2,6-DMN) in various solvents are of great significance for the separation and oxidation process. The solubilities of 2,6-DMN in six pure solvents including isopropyl alcohol, n-heptane, cyclohexane, ethyl acetate, n-propyl acetate, and 2,2,4-trimethylpentane and two binary solvent mixtures (formic acid + water and acetic acid + water) were measured by a static analytical method with water content in the binary solvent systems varying from 0 to 0.2 at atmospheric pressure. The λh model and nonrandom two-liquids (NRTL) model were used to correlate these solubility data, and the relevant parameters were regressed by the least-squares method. and there is satisfactory agreement between the experimental results and model prediction derived from the λh model and NRTL model.

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Section: Experimental Sectionmentioning

confidence: 94%

Solubilities of 2,6-Dimethylnaphthalene in Six Pure Solvents and Two Binary Solvent Systems

et al. 2019

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“…Details of the analytical method can be found in Kong et al (2013). Three parallel samples were prepared and analyzed for each experimental run to evaluate the relative deviation, which was shown to be less than 1%.…”

Section: Methodsmentioning

confidence: 99%

“…The phase equilibrium relationship of PT acid in PX and water phases has been described by the non-random two liquid (NRTL) activity coefficient model (Kong et al, 2013). The model, however, has a complicated expression.…”

Section: Estimation Of Phase Equilibrium Parameters and Diffusivitiesmentioning

confidence: 99%

Non-dispersive solvent extraction of p-toluic acid from purified terephthalic acid plant wastewater with p-xylene as extractant

Kong

Cheng

Wang

et al. 2016

J. Zhejiang Univ. Sci. A

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Non-dispersive solvent extraction (NDSE) with p-xylene as extractant was employed as a novel separation method to recover both p-toluic (PT) acid and water from purified terephthalic acid (PTA) wastewater. The mass transport behavior of PT acid from aqueous solution to p-xylene was investigated by experiments and numerical simulation. Experiments showed that NDSE is feasible and effective. Residual PT acid in the raffinate can be reduced to lower than the permitted limit of wastewater re-use (100 g/m 3 ) with extraction time longer than 60 s in industrial conditions. A mathematical model of PT acid mass transport was developed to optimize the membrane module performance. The model was validated with the experimental results with relative errors of less than 6%. Numerical analysis for mass transfer through the lumen side, the porous membrane layer, and the shell side showed that PT acid transport in the aqueous solution is the rate determining step. The effects of the membrane and operating parameters on membrane module performance were investigated by means of computational simulations. The key parameters suggested for industrial NDSE design are: fiber inner radius r 1 =200-250 μm, extraction time t e =50-60 s, aqueous/ organic volumetric ratio a/o=9.0, and temperature T=318 K.

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“…The solubility of terephthalic acid in N -methyl-2-pyrrolidone, ( N -methyl pyrrolidone + water) and ( N , N -dimethylacetamide + water) binary mixtures, tetrahydrofuran, cyclohexanone, acetophenone, ethylene glycol diethyl ether, and isobutyl acetate have been measured and correlated by the λ h model, Apelblat model, UNIQUAC, and Wilson model . Similarly the solubility of 4-methylbenzoic acid in N , N -dimethylacetamide, acetic acid, N -methyl pyrrolidone, trichloromethane, N , N -dimethylformamide and water, isobutyl acetate, octanol, (methanol + acetic acid) binary mixtures, 1,4-dimethyl-benzene and water, methanol, ethanol, isopropanol, n -butanol, acetonitrile, and acetone have been measured and correlated by the λ h model, UNIQUAC, and Wilson model . Unfortunately, there is no report of the solubility of terephthalic acid and 4-methylbenzoic acid in the possible potential organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Measurement and Correlation of Solubilities of 4-Methylbenzoic Acid and Terephthalic Acid in Eight Organic Solvents

et al. 2021

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In this study, the solubility of 4-methylbenzoic acid and terephthalic acid in N-methylformamide, 1,3-dimethyl-2-imidazolidinone, N-methylformanilide, 2-ethyl-1-hexanol, tetrahydrofuran, cyclohexanone, acetophenone, and ethylene glycol diethyl ether was measured using the laser dynamic method under 101.3 kPa at the temperature ranging from 293.65 to 344.35 K. The measured results showed that the solubility of 4-methylbenzoic acid and terephthalic acid increased with the increasing temperature. The solubility of 4methylbenzoic acid is greater than that of terephthalic acid in the same solvents. The modified Apelblat model and the modified nonrandom two-liquid (NRTL) activity coefficient model were utilized to correlate the solubility of 4-methylbenzoic acid and terephthalic acid in each solvent. The calculated solubility agreed satisfactorily with the measured results with 1.67/1.91% averaged relative deviation (ARD) for terephthalic acid and 0.62/0.69% for 4-methylbenzoic acid in the modified NRTL/Apelblat model, respectively. The result of the Akaike Information Criterion (AIC) analysis showed that the modified Apelblat model was better at correlating the solubility of 4-methylbenzoic acid in 1,3-dimethyl-2-imidazolidinone, ethylene glycol diethyl ether, tetrahydrofuran, acetophenone, N-methylformamide, acetophenone, and terephthalic acid in 1,3dimethyl-2-imidazolidinone; the modified NRTL model performs better in correlating the solubility of 4-methylbenzoic acid in Nmethylformanilide, N-methylformamide, 2-ethyl-1-hexanol, and terephthalic acid in 2-ethyl-1-hexanol, 2-ethyl-1-hexanol, and cyclohexanone N-methylformanilide.

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Solubility and partition coefficient of p-toluic acid in p-xylene and water

Cited by 9 publications

References 49 publications

Solubilities of 2,6-Dimethylnaphthalene in Six Pure Solvents and Two Binary Solvent Systems

Solubilities of 2,6-Dimethylnaphthalene in Six Pure Solvents and Two Binary Solvent Systems

Non-dispersive solvent extraction of p-toluic acid from purified terephthalic acid plant wastewater with p-xylene as extractant

Measurement and Correlation of Solubilities of 4-Methylbenzoic Acid and Terephthalic Acid in Eight Organic Solvents

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