甲缩醛－甲醛－水三元系的汽液平衡研究

Study on Vapor Liquid Equilibria of the Methylal-Formaldehyde-Water Ternary System

用新型泵式沸点仪测定了常压下甲缩醛－甲醛－水三元系在不同液相组成时的沸点，采用＂甲醛虚拟饱和蒸汽压＂的处理方法，用Ｗｉｌｓｏｎ方程对所测数据进行了关联，建立了该系统汽液平衡的热力学模型，并推算了平衡的汽相组成．

The boils of the methylal - formaldehyde - water ternary system were determined at the atmospheric pressure with a new motive cottrell pump -ebulliometer.Tnese datas had been treated using a method of'formaldehyde hypothetical saturation-vapor pressure'(FHSVP) and the Wilson equation,setting up the thermodynamic model of this system on the vapor liquid equilibria(VLE).The equilibria composition of the vapor phase had been calculated.