文献类型：期刊文献

英文题名：Solid-liquid equilibrium of dicyandiamide in different solvents

作者：Zhang, Xiangyang[1];Qian, Gang[1];Yang, Xiangyu[1];Hu, Cuilian[1];Zhou, Xinggui[1]

机构：[1]E China Univ Sci & Technol, Sch Chem Engn & Technol, Shanghai 200237, Peoples R China

年份：2014

卷号：363

起止页码：228

外文期刊名：FLUID PHASE EQUILIBRIA

收录：;EI(收录号：20140117161129);WOS:【SCI-EXPANDED(收录号:WOS:000331494600027)】；

基金：We thank the financial support by the Doctoral Fund of Ministry of Education of China (2011M500511) and the 111 Project of Ministry of Education of China (B08021) for their financial assistances in this project.

语种：英文

外文关键词：Dicyandiamide; Solubility; Solvent; Ideal solubility; Activity coefficient

摘要：Solubilities of dicyandiamide in five different solvents including water, methanol, ethanol, glycol and acetone were determined at temperature ranging from 273.15 to 338.95 K at atmospheric pressure using a gravimetric method. Fusion enthalpy, Delta H-f, melting temperature, T-m, and the difference in molar heat capacity of the liquid and solid form of dicyandiamide, Delta C-p, were determined by differential scanning calorimetry. On this basis, the ideal solubility of dicyandiamide was calculated, and validity of heat capacity assumptions (specifically, Delta C-p = 0) in predicting the ideal solubility has been evaluated. Further, the measured solubility data was used with the calculated ideal solubility to obtain activity coefficients, which were then fitted to a van't Hoff like regular solution equation. (C) 2013 Elsevier B.V. All rights reserved.