乙酸乙酯-异丙醚和乙酸乙酯-四氢呋喃物系常压汽液平衡数据的测定

在常压(101.3kPa)下,用汽液平衡釜测定了乙酸乙酯-异丙醚和乙酸乙酯-四氢呋喃二组分物系的汽液平衡数据。所测得的汽液平衡数据符合热力学一致性检验。利用修正的UN IFAC方程和W ilson方程对实验数据进行了关联,得到了W ilson方程的参数Λ12和Λ21。对于乙酸乙酯(1)-异丙醚(2)二组分物系,Λ12为0.387 7,Λ21为1.481 2,实验值与W ilson方程计算值的平均偏差为0.003 5;对于乙酸乙酯(1)-四氢呋喃(2)二组分物系,Λ12为0.929 4,Λ21为0.731 0,实验值与W ilson方程计算值的平均偏差为0.004 6。实验结果表明,乙酸乙酯-异丙醚和乙酸乙酯-四氢呋喃二组分物系均不形成共沸物。

Vapor-Liquid Equilibrium Data of Ethyl Acetate-Isopropyl Ether and Ethyl Acetate-Tetrahydrofuran Systems at Atmospheric Pressure

Vapor-liquid equilibrium data of ethyl acetate-isopropyl ether and ethyl acetate-tetrahydrofuran binary systems were measured at atmospheric pressure(101.3kPa).Experimental data were in accordance with thermodynamic consistency test.The data were correlated and calculated with modified UNIFAC equation and Wilson equation,separately.Wilson equation parameters Λ_(12) and Λ_(21) were obtained.To ethyl acetate(1)-isopropyl ether(2)binary system,Λ_(12) and Λ_(21) were 0.387 7,(1.481 2;)to ethyl acetate-tetrahydrofuran binary system Λ_(12) and Λ_(21) were 0.929 4,0.731 0.Correlation results of Wilson equation were more suitable to experiment data.Average deviation between calculated values and experimental data for vapor phase composition of ethyl acetate-isopropyl ether binary system was 0.003 5,and average deviations for ethyl acetate-tetrahydrofuran binary system was 0.004 6.Azeotrope formed neither in ethyl acetate-isopropyl ether nor in ethyl acetate-tetrahydrofuran binary systems.