The experimental data are correlated by using uniquac and nrtl models , and the model parameters of this system have been obtained respectively , and the selectivity coefficients of the extracted solvent to solutes were calculated 實驗數(shù)據(jù)用uniquac和nrtl模型進行關(guān)聯(lián),分別得到了三元體系的模型參數(shù),并求得了萃取溶劑對溶質(zhì)的選擇性系數(shù)。