含甲基叔丁基醚的四元体系液液相平衡

Liquid-liquid equilibria for quaternary systems with 1,1-dimethylethyl methyl ether

为了考察甲基叔丁基醚对汽油主要成分烃类化合物与水相互溶解性的影响,在298.15 K和常压下,测定了2个四元体系水-甲基叔丁基醚-异辛烷-异丙醇和水-甲基叔丁基醚-异辛烷-甲苯的液液相平衡数据,并用含有二元、三元和四元相互作用参数的Extended UNIQUAC模型和Modified UNIQUAC模型对液液相平衡数据进行了关联计算。结果表明:在298.15 K时测得的四元体系液液相平衡数据和模型的计算结果很吻合,Extended UNIQUAC和Modified UNIQUAC模型成功地描述了四元混合液的液液相平衡,这些基础数据对化工生产过程的设计和分离操作条件的选择都是非常有意义的。

To assess the effect of 1,1-dimethylethyl methyl ether addition on hydrocarbon-water mutual solubilities, liquid-liquid equilibria for two quaternary systems of （ water ＋ 1, 1-dimethylethyl methyl ether ＋ 2, 2, 4- trimethylpentane ＋ 2-propanol） and （ water ＋ 1,1 -dimethylethyl methyl ether ＋ 2,2,4-trimethylpentane ＋ toluene ） were measured at 298.15 K and ambient pressure. The experimental quaternary liquid-liquid equilibrium data were correlated by using Extended UNIQUAC model and Modified UNIQUAC model with ternary and quaternary interaction parameters in addition to binary ones. The result shows that the experimental results measured at 298.15 K are in good agreement with the calculated results. The Extended and Modified UNIQUAC models are able to represent successfully the experimental liquid-liquid equilibrium results. These results are useful for separation and extraction process design of chemical engineering.