Solubility and metastable zone width measurement of 2,4-diaminobenzenesulfonic acid in(H_(2)SO_(4)+H_(2)O)system  

作　　者：Fanfan Shen Lizhen Chen Pengbao Lian Jianlong Wang Duanlin Cao 

机构地区：[1]School of Chemical Engineering and Technology,North University of China,Taiyuan 030051,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第4期384-391,共8页中国化学工程学报（英文版）

基　　金：supported by Scientific and Technologial Innovation Programs of Higher Education Institutions in Shanxi。

摘　　要：The equilibrium solubility of 2,4-diaminobenzenesulfonic acid and super solubility as well as metastable zone width were measured in(H_(2)SO_(4)+H_(2)O) system by the laser dynamic method at elevate temperature range from 298.15 K to 338.15 K.2,4-Diaminobenzenesulfonic acid solubility dependence on the temperature and solvent composition were correlated by the modified Apelblat equation,(CNIBS)/Redlich-Kister model and Jouyban-Acree model.The correlated results by three correlation models were in good accord with the experimental values according to relative average deviations(RD),root-mean-square deviations(RMSD),and correlation coefficients(R^(2)).The metastable zone width increased with temperature and sulfuric acid content.The dissolution enthalpy,dissolution entropy and the Gibbs energy were calculated from the experimental values,which indicated that dissolution process of the 2,4-diaminobenzenesulfonic acid was endothermic.The solubility and calculation models of 2,4-diaminobenzenesulfonic acid in(sulfuric acid+water)system could provide the basic data to the crystallization and purifying of the 2,4-diaminobenzenesulfonic acid.

关 键 词：2 4-Diaminobenzenesulfonic acid SOLUBILITY CORRELATION Metastable zone width 

分 类 号：TQ245.12[化学工程—有机化工]