Measurement and correlation of the solubility of sodium acetate in eight pure and binary solvents  

作　　者：Xi Wu Shuaishuai Yang Shiming Xu Xinjie Zhang Yujie Ren 

机构地区：[1]Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education,School of Energy and Power Engineering,Dalian University of Technology,Dalian 116024,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第4期474-484,共11页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(52076026,51606024,51776029);the Project of the Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education,China(LOEC-201904)。

摘　　要：The knowledge of solubility of a salt in either the pure solvent or blend solvent is of great importance for studying or operating the crystallization,extraction,and distillation processes.The solubility of sodium acetate(NaAc)in four pure solvents(water,ethanol,acetic acid and 2,2,2-trifluoroethanol)and four binary solvents(water–ethanol,water-acetic acid,acetic acid–ethanol,and acetic acid-ethyl acetate)were measured by using the laser dynamic method at temperatures from 288.15 K to 338.15 K at 0.1 MPa.The results showed that the solubility of NaAc was influenced by either the solution temperature or solvent composition.The aqueous sodium acetate solution possessed the maximal solubility under the experimental conditions.The solubility of NaAc in 2,2,2-trifluoroethanol was found to be decreased with the increase of the solution temperature.While,the solubilities of NaAc in other seven solvents increased as the solution temperature was elevated.Besides,five correlation models,including the van’t Hoff model,modified Apelblat model,Yaws model,λh model,and modified Apelblat-Jouyban-Acree model were used to correlate the solubility data of those sodium acetate solutions with acceptable deviation,respectively.Finally,van’t Hoff analysis method was selected to analyze the change law of thermodynamic properties of a salt during the dissolution process.

关 键 词：SOLUBILITY Sodium acetate SOLUTION Water SOLVENT 

分 类 号：O645.12[理学—物理化学]