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Thermodynamic Models for Determination of the Solubility of Dibenzothiophene in Different Solvents at Temperatures from (278.15 to 328.15) K

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State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
Taiyuan Qiaoyou Chemical Industrial Co. Ltd., Taiyuan 030025, China
*E-mail: [email protected]. Tel.: +86 25 5813 9208. Fax: +86 25 5813 9208.
Cite this: J. Chem. Eng. Data 2014, 59, 9, 2799–2804
Publication Date (Web):August 14, 2014
https://doi.org/10.1021/je500437m
Copyright © 2014 American Chemical Society

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    Abstract

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    Data on corresponding solid–liquid equilibrium of dibenzothiophene (DBT) in different solvents are essential for a preliminary study of industrial applications. In this study, the solubility behavior of DBT in different solvents, such as methanol, ethanol, isopropyl alcohol, butan-1-ol, formic acid, and acetonitrile at temperatures ranging from (278.15 to 328.15) K was investigated. An analytical stirred-flask method was employed to measure the dissolubility of DBT. For the temperature range investigated, the solubility of dibenzothiophene in the solvents increased with increasing temperature. The thermodynamic models, such as the Van ‘t Hoff model, the modified Apelblat model and the Buchowski–Ksiazaczak λh model were investigated to describe the experimental data. It was found that the modified Apelblat model was the most suitable for predicting the solubility behavior of DBT with a temperature increment. The calculated thermodynamic parameters indicated that in each studied solvent the dissolution process of DBT is endothermic.

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