H2O+LiBr+[DMIM]DMP和H2O+LiCl+[DMIM] DMP三元体系的气液相平衡测定

离子液体1,3-二甲基咪唑磷酸二甲酯（DMIM]DMP）作为添加剂，加入到传统二元工质对体系H2O+LiBr和H2O+LiCl中形成三元体系，其中LiBr/LiCl与DMIM]DMP的质量比为3∶1。采用沸点法，测定了H2O+LiBr+DMIM]DMP和H2O+LiCl+DMIM]DMP两个三元体系在不同温度不同质量分数下的饱和蒸气压数据。H2O+LiBr+DMIM]DMP体系测定的温度范围为298.63～409.67K，质量分数范围为20%～60%；H2O+LiCl+DMIM]DMP体系的温度范围为300.35～404.17K，质量分数范围为10%～47%。采用Antoine方程对实验数据进行关联，实验值与计算值的平均相对偏差分别为0.99%和1.12%。

Vapor-liquid equilibrium measurements for the H2O + LiBr + [DMIM]DMP and H2O + LiCl + [ DMIM]DMP ternary systems

The ionic liquid(IL),1,3-dimethylimidazolium dimethylphosphate(DMP),was added to the binary systems H2O+LiBr and H2O+LiCl,which are traditional working fluids.The vapor pressure data were measured for the ternary systems H2O+LiBr+DMP(with a mass ratio of LiBr/DMP of 3∶1) and H2O+LiCl+DMP(with a mass ratio of LiCl/DMP of 3∶1) by means of the boiling point method.For the H2O+LiBr+DMP system,the measured ranges of temperature and mass fraction of IL were from 298.63K to 409.67K and from 20% to 60%,respectively,while for the H2O+LiCl+DMP system the corresponding values were from 300.35K to 404.17K and from 10% to 47%,respectively.An Antoine-type equation was used to correlate the experimental data for the ternary systems.The average absolute relative deviations(ARDs) between the experimental and calculated values for the pressure of the two ternary systems were 0.99% and 1.12%,respectively.