Thermodynamic Models for Determination of the Solubility of the (1:1) Complex of (Urea + l-Malic Acid) in (Methanol + Acetonitrile) Binary Solvent Mixtures

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• 作者：Qi Zhang ; Yonghong Hu ; Yang Yang ; Cuicui Cao ; Limin Cheng ; Yonglan Li ; Wenge Yang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2015
• 出版时间：June 11, 2015
• 年：2015
• 卷：60
• 期：6
• 页码：1608-1613
• 全文大小：229K
• ISSN：1520-5134

文摘

In this paper, we focused on solubility and solution thermodynamics of urea l-malic acid (1:1 solid state compound). By gravimetric method, the solubility of urea l-malic acid was measured in (methanol + acetonitrile) binary solvent mixtures in the temperature (from 278.15 K to 333.15 K). The solubility data were fitted using modified Apelblat model, a variant of the combined nearly ideal binary solvent/Redlich鈥揔ister (CNIBS/R鈥揔) model and Jouyban鈥揂cree equation. Computational results showed that the modified Apelblat model has advantages than the other two models. In addition, we used van鈥檛 Hoff analysis and Gibbs equation to help later scholars understand the thermodynamic properties in the process of dissolving. The experimental data showed that acetonitrile could be used as effective antisolvents.