水-异丁醛二元体系相平衡的测定和关联

水-异丁醛是部分互溶的体系,而且异丁醛化学性质较活泼,实验难度大,文献报导的一些数据精度较差,互相也不一致.本文对异丁醛易氧化、易聚合的化学特性进行了测定探索,并采取有效的措施,使实验数据有良好的重复性.本文测定了760mmHg下水-异丁醛二元体系液液平衡和汽液平衡数据,并用NRTL方程和多参数Wilson方程进行关联,根据汽液平衡实验数据、液液平衡实验数据以及同时联合两者分别回归得出三组二元参数,由二元参数所计算汽液平衡数据与实测数据相比较,均得到满意的结果.

Phase Equilibria for the Binary System of Water-Isobutyl Aldehyde

Equilibrium properities of the partially miscible system of water and isobutyl aldehyde were difficult to measure due to the latters chemical activity, and as such, the accuracy of literature data is generally poor. Effective steps were taken in the present work to prevent oxidation and polymerization of isobutyl aldehyde, thereby insuring good reproducibility of the data obtained. In this work, vapor-liquid equilibrium and liquid-liquid equilibrium data for this binary system, measured at 760 mm Hg, are correlated by using both the NRTL equation and the multiparameter Wilson equation (Mitsuyasu method). Three sets of binary parameters for each equation are determined in the following manner: (1)based on VLE experimental data alone, (2)based on LLE experimental data alone and(3) based on both VLE and LLE data. The vapor compositions calculated from these two equations with the three sets of binary parameters all agree well with the experimental data.