Solubility and solution thermodynamics of ammonium dihydrogen phosphate in the water-methanol system

被引：10

作者：

Xu, Dejun ^{[1
]}

Xu, Dehua ^{[1
]}

Zhong, Yanjun ^{[1
]}

Luo, Tao ^{[1
]}

Yang, Xiushan ^{[1
]}

Zhang, Zhiye ^{[1
]}

Yang, Lin ^{[1
]}

Wang, Xinlong ^{[1
]}

机构：

[1] Sichuan Univ, Sch Chem Engn, Chengdu 610065, Peoples R China

来源：

CHINESE JOURNAL OF CHEMICAL ENGINEERING | 2019年 / 27卷 / 10期

关键词：

Ammonium dihydrogen phosphate; Solubility; Water-methanol system; PLUS WATER; ANTISOLVENT CRYSTALLIZATION; ETHANOL; GROWTH; TEMPERATURES; SOLVENTS; REMOVAL; CRYSTAL; PURE; ACID;

D O I：

10.1016/j.cjche.2019.02.010

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The solubility of ammonium dihydrogen phosphate (MAP) in the water-methanol system is essential for antisolvent crystallization studies. To investigate the effect of methanol on the solubility of MAP in water, the solubility of MAP in the water-methanol system was determined by dynamic method and static equilibrium method at temperatures ranging from 293.2 to 343.2 K at atmospheric pressure. Results showed that the solubility of MAP increased with the increase of temperature and the increase of water mole fraction in the water-methanol system. The experimental solubility data were correlated with the modified Apelblat equation, the combined nearly ideal binary solvent/Redlich-Kister (CNIBS/R-K) model and the Jouyban-Acree model. The calculated results based on these three models were in very good agreement with the experimental data with the average relative deviations of 0.65%, 0.97%, and 538%, respectively. Simultaneously, the thermodynamic properties of the MAP dissolution process in the water-methanol system, including Gibbs energy change, enthalpy, and entropy were obtained by the Van't Hoff equation, which can be used to assess the crystallization process. (C) 2019 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd.. All rights reserved.

引用

页码：2518 / 2525

页数：8

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