Thermodynamic analysis and correlation of solid-liquid equilibrium of hyodeoxycholic acid in ethanol + (acetone, ethyl acetate) binary solvent mixtures

Yang Yang, Yang Cao, Yonghong Hu, Qi Zhang, Wenge Yang, Fei Shen

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Abstract Data on corresponding solid-liquid equilibrium of hyodeoxycholic acid (HDCA) are essential for a preliminary study of industrial applications. In this paper, we focused on solubility and solution thermodynamics of HDCA. By gravimetric method, the solubility of HDCA was measured in ethanol + (acetone, ethyl acetate) binary solvent mixtures from 278.15 K to 328.15 K under atmospheric pressure. The data of equilibrium solubility were then fitted using modified Apelblat equation, a variant of the combined nearly ideal binary solvent/Redich-Kister (CNIBS/R-K) model and Jouyban-Acree model. In addition, the thermodynamic properties of the solution process, including the Gibbs energy, enthalpy, and entropy, were calculated by the van't Hoff analysis.

Original languageEnglish
Article number4961
Pages (from-to)268-274
Number of pages7
JournalJournal of Molecular Liquids
Volume211
DOIs
StatePublished - 25 Jul 2015

Keywords

  • Apelblat equation
  • CNIBS/R-K
  • Hyodeoxycholic acid
  • Jouyban-Acree model
  • van't Hoff analysis

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