利用二环己基-18-冠-6和二-(2-乙基己基)磷酸协同萃取硝酸铀酰的研究

THE SYNERGISTIC EXTRACTION OF URANYLION BY HDEHP AND DC18C6

研究了利用二环己基１８冠６（ＤＣ１８Ｃ６）和二（２乙基己基）磷酸（ＨＤＥＨＰ）的硝基苯溶液，在硝酸介质中对六价铀的协同萃取行为．通过实验确定了协萃反应方程式，而且测得了在硝酸介质中萃取平衡的表观常数值．

The synergistic extraction of uranyl ion from nitric acid into nitrobenzene by HDEHP (H2A2) and DC18C6(B) is studied.Experimental results indicate that the synergistic extraction reactions is as follows:UO2+2+2H2A2+BUO2A2(HA)2B+2H+.The estimated values of equilibrium constants K12 of the synergistic extraction reaction is 4.85×106 in the nitric acid solution.