酒石酸钠二水合物的溶解度测定及关联

发布时间：2018-06-06 01:42

本文选题：酒石酸钠二水合物 + 乙醇-水混合溶剂　；参考：《化学工程》2017年12期

【摘要】：用动态法测定了酒石酸钠二水合物在不同质量配比的乙醇-水混合溶剂中的溶解度,以期为酒石酸钠二水合物提供结晶热力学数据。结果表明:酒石酸钠二水合物在乙醇-水混合溶剂中的溶解度随水质量分数和温度的增加而增加,但随着水质量分数的增加,升高温度对酒石酸钠溶解度的增加量逐渐变小。采用Modified Apelblat,Van't-JA及Apel-JA方程对溶解度数据进行了关联,均方根偏差最大为6.24×10~(-4)。所选热力学方程均能很好的关联溶解度数据,其中Modified Apelblat方程的关联效果最好。此外,采用Van't Hoff方程计算了酒石酸钠二水合物在乙醇-水混合溶剂中的表观溶解热力学数据,数据表明其溶解过程为非自发的吸热过程。
[Abstract]:The solubility of sodium tartrate dihydrate in ethanol-water mixed solvents with different mass ratios was determined by dynamic method in order to provide thermodynamic data of crystallization for sodium tartrate dihydrate. The results show that the solubility of sodium tartrate dihydrate in ethanol-water mixed solvent increases with the increase of water mass fraction and temperature, but the increase of sodium tartrate solubility decreases with the increase of water mass fraction. The solubility data were correlated by Modified Apelblatine Vant-JA and Apel-JA equations. The maximum root mean square deviation was 6.24 脳 10 ~ (-1) ~ (-4) ~ (-1). The selected thermodynamic equations can correlate the solubility data well, and Modified Apelblat equation has the best correlation effect. In addition, the thermodynamic data of the apparent dissolution of sodium tartrate dihydrate in ethanol-water mixed solvents were calculated by Van't Hoff equation. The results show that the dissolution process is a non-spontaneous endothermic process.
【作者单位】：河南工业大学化学化工学院;
【基金】：国家自然科学基金资助项目(21206032) 高校青年骨干教师项目(2015GGJS-039) 河南工业大学人才基金(2016BS025)
【分类号】：O645.12

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