常压下丁酮-丁酮连氮体系汽液平衡数据的测定与关联

Measurement and correlation of VLE data for butanone-methyl ethyl ketazine binary system under normal pressure

为了解决水合肼生产中中间产物丁酮连氮与丁酮、水合肼等的分离问题,利用双循环汽液平衡釜,在常压(100 kPa)下测定了丁酮-丁酮连氮体系的汽液平衡数据,并用Herrington规则对测量数据进行热力学一致性检验,实验结果符合热力学一致性。利用化工模拟软件应用热力学方程WILSON,NRTL和UNIQUAC方程对实验数据进行关联和预测。得到了相关的模型参数,结果表明UNIQUAC模型对实验数据的吻合性最好,汽相组成的计算值与实验值最大绝对偏差不超过0.03,平均值不超过0.004。为工业分离工艺的设计提供了参考。

The vapor-liquid equilibrium （VLE ）data of butanone and methyl ethyl ketazine system were measured by using a double-circulating vapor-liquid equilibrium still at 100 kPa.The thermodynamic consistency of the VLE data was examined by Herrington method and the result was satisfactory.The experimental data were correlated by the Wilson, nonrandom two-liquid （NRTL ）, and universal quasichemical activity coefficient （UNIQUAC ） parameter models.All of the models were satisfactorily correlated with the VLE data.The result shows that the UNIQUAC model is the most suitable one to represent the experimental data satisfactorily.The maximum deviation of vapor-phase calculation value and experimental value is less than 0.03,with the average absolute value less than 0.004.It provides a reference for industrial separation processes design of butanone and methyl ethyl ketazine in hydrazine hydrate production process.