摘要
本文应用 Pitzer 电解质溶液理论,建立了适合于 CO(NH_2)_2-H_3PO_4-H_2O三元体系的活度系数模型,计算了该三元体系在20和40℃时的相平衡数据,得到较为满意的结果.
In this paper,we have applied Pitzer’s electrolyte solution theory to CO(NH_2)_2-H_3PO_4-H_2O ternary system.On the basis of some llegitimate assumptions,we have put forward the equations of activity coefficient for H^+,H_2PO_4^-,H_3PO_4,CO(NH_2)_2 particles and we have also founded the values of interaction parameters among these particles. With the equaitons of activity coefficient we have calculated the data of phase epuilibrium for CO(NH_2)_2—H_3PO_4—H_2O.system at 20,40℃ respectivily.The calculations are in agreement with the experimental data This result shows that the Pitzer electrolyte solution theory could be used to CO(NH_2)_2—H_3PO_4—H_2O system.
关键词
尿素
磷酸
相平衡
urea
phosphoric acid
phase equilibrium
