Thermodynamic analysis and correlation of cyromazine in three (acetic acid, propanoic acid or ethylene glycol plus water) binary solvents at different temperatures
Thermodynamic analysis and correlation of cyromazine in three (acetic acid, propanoic acid or ethylene glycol plus water) binary solvents at different temperatures
复制标题
不同温度下灭蝇胺在三种（乙酸、丙酸或乙二醇加水）二元溶剂中的热力学分析和关联
DOI：
10.1016/j.molliq.2018.09.047
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发表时间：
2018
影响因子：
6
通讯作者：
Ren Baozeng
中科院分区：
文献类型：
--
作者：
Zhang Pengshuai;Zhao rui;Zhang Chi;Wan Yameng;Li Tao;Ren Baozeng
用重量法测定了环丙氨嗪在乙酸+水、丙酸+水、乙二醇+水三种二元混合溶剂中的溶解度，温度范围为278.15 ~ 333.15 K。实验结果表明，环丙氨嗪在三种溶剂中的溶解度均随温度的升高而增大。用Apelblat方程、λ方程、通用单一模型（GSM）方程和修正的Jouyban-Acree模型方程对环丙氨嗪的溶解度进行了关联。计算了环丙氨嗪在所选溶剂中的溶解热力学性质：Δ solH 0（表观标准焓变）、Δ solS 0（表观标准熵变）、Δ solG 0（表观标准吉布斯自由能变）、Δ solH（相对焓贡献）和Δ solTS（相对熵贡献）。Δ solH 0、Δ solG 0、Δ solH ≥ 0.5984、Δ solTS ≤ 0.4016均为正值，表明环丙氨嗪在3种二元溶剂中的溶出为热力学驱动吸热过程。环丙氨嗪溶解度的实验研究为环丙氨嗪的结晶、纯化和应用提供了良好的指导和基础数据。
The solubility of cyromazine in three binary solvent mixtures (acetic acid + water, propanoic acid + water, ethylene glycol + water) were measured by a gravimetric method from 278.15 K to 333.15 K under atmospheric pressure. The experimental results reveal that the mole fraction solubility of cyromazine increased with the increase of temperature in the three solvents. The Apelblat equation, theλhequation, the general single model (GSM) equation and the modified Jouyban-Acree model equation were all applied to correlate the experimental solubility of cyromazine well. Moreover, the dissolution thermodynamic properties: ΔsolH0(the apparent standard enthalpy change), ΔsolS0(the apparent standard entropy change), ΔsolG0(the apparent standard Gibbs energy change),ζH(relative contribution of enthalpy) andζTS(relative contribution of entropy) of the dissolution of cyromazine in the selected solvents were calculated. The positive values of ΔsolH0, ΔsolG0, ζH≥ 0.5984 and ζTS≤ 0.4016 indicated that the dissolution of cyromazine in the three binary solvents was enthalpy-driving and endothermic process. The experimental solubility of cyromazine in this work can provide good guidance and fundamental data for the crystallization, purification and application of cyromazine.