文献类型：期刊文献

英文题名：Correlation of solubility and calculation of thermodynamic properties of guanidine nitrate in different solvents

作者：Zhang, Xiangyang[1,2];Qian, Gang[1];Wang, Rui[3];Yang, Xiaowu[4];Hao, Lin[3];Wei, Hongyuan[3];Zhou, Xinggui[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Dept Prod Engn, Shanghai 200237, Peoples R China;[3]Tianjin Univ, Sch Chem Engn, Tianjin 300072, Peoples R China;[4]China Huanqiu Constracting & Engn Corp, Shanghai 200032, Peoples R China

年份：2015

卷号：388

起止页码：59

外文期刊名：FLUID PHASE EQUILIBRIA

收录：;EI(收录号：20150200404985);WOS:【SCI-EXPANDED(收录号:WOS:000349878800009)】；

基金：We thank the financial support by the National Natural Science Foundation of China (NSFC, No. 21406071), the 111 Project of Ministry of Education of China (B08021) and Ningxia Beilite Chemical Industry Co., Ltd.

语种：英文

外文关键词：Guanidine nitrate; Solubility; Solvent; Thermodynamic modeling

摘要：To realize the rapid solvent screening and further crystallization process optimization, experimental determination of accurate solubility data of target solute in potential solvents is necessary. Using a gravimetric method, solubilities of guanidine nitrate in water, methanol, ethanol, n-propanol and acetone at temperature ranging from 278.05 K to 332.85 K at pressure p = 0.1 MPa were experimentally measured. Melting temperature, T-m, and fusion enthalpy, Delta H-f, of guanidine nitrate were determined using differential scanning calorimetry. Subsequently, Apelblat equation, van't Hoff equation, lambda h equation, and Wilson model were used to correlate the measured solubility data, respectively. Dissolution of guanidine nitrate in all examined solvents was found to be endothermic and entropically favorable. Moreover, the measured solubility data were combined with calculated ideal solubility data to calculate activity coefficients at infinite dilution based on the assumption of Delta C-p = 0, which were then fitted to a van't Hoff like regular solution equation. (C) 2014 Elsevier B.V. All rights reserved.