Study on the three-phase extreaction system of tbp-kerosene/H_3PO_4-H_2O

摘要

The phase behavior and phase compositionof TBP-kerosene/H_3PO_4-H_2O three-phase extractionsystemhave been investigated and compared with the two-phase systemwithout the diluent.In TBP-kerosene/H_3PO_4-H_2O system,the formation of the third phase is related only to the equilitrium concentration of H_3PO_4 in the bottom(aqueous phase)(C_(H_3PO_4,b)>9.8mol/L).The composition of the middle phase is not a function of only the C_(H_3PO_4)=9.8mol/L,the composition of the4 extracted complex in the middle phase is (TBP)·(H_3PO_4)·(H_2O)_(0.5),which is the same as that of the organic phase in two-phase system.