摘要
Abstract
The DSC,TG,DTG curves of peroxysuccinic acid were determined by comprehensive thermal analysis-mass spectrometry,and the melting temperature and melting enthalpy were obtained by the DSC exothermic curve of peroxysuccinic acid.The solid-liquid equilibrium data of peroxysuccinic acid in four solvents,namely,butyl acetate,ethyl acetate,acetonitrile and ethyl propionate,were determined by static method at 0-50 ℃ in conjunction with the process conditions for ε-caprolactone production.The solubilities(n(solute):n(solvent))of peroxysuccinic acid in the four solvents were simulated using λh,NRTL,and Apelblat models,respectively,and the experimental data were correlated with the simulated data and designed for industrialization.The experimental results show that,peroxysuccinic acid will not decompose at 80 ℃.Its solubility in the four solvents differes greatly,and the higher solubility is that in ethyl propionate and ethyl acetate.The maximum average relative error between the experimental values and simulated values obtained by using the models of λh,NRTL,and Apelblat is 3.36％,2.67％,2.88％,respectively,and the data consistency is good and the models are reliable,and the three models can be used for determining the solubility of peroxysuccinic acid.关键词
过氧丁二酸/溶解度/λh模型/NRTL模型/Apelblat模型Key words
[Keysword]peroxysuccinic acid/solubility/λh model/NRTL model/Apelblat model分类
化学化工
