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络合萃取法分离极性有机物稀溶液具有高效性和高选择性.本文利用三辛胺(TOA)或磷酸三丁酯(TBP)为络合剂,四氯化碳、三氯甲烷、正辛醇或煤油为稀释剂,实验测定了苯甲酸、邻硝基苯甲酸稀溶液的萃取相平衡分配系数,讨论了影响因素.实验测定了TOA在不同稀释剂中的表观碱度.提出了同时考虑络合萃取作用和物理萃取作用的平衡分配系数的表达式.
Complexation extraction of polar organic dilute solution with high efficiency and selectivity.In this paper, three octylamine (TOA) or tributyl phosphate (TBP) as a complexing agent, carbon tetrachloride, chloroform, Alcohol or kerosene as diluent, the equilibrium partition coefficient of extraction phase of benzoic acid and o-nitrobenzoic acid was experimentally determined, and the influencing factors were discussed.The apparent alkalinity of TOA in different diluents was determined experimentally An expression for the equilibrium partition coefficient considering both complexation and physical extraction.