DENSITY AND VISCOSITY OF TRIBUTYL PHOSPHATE plus TRIOCTYLAMINE plus PHOSPHORIC ACID FROM (20∼60) °C

The viscosities and densities of tributyl phosphate (TBP) + trioctylamine (TOA) + phosphoric acid (PA) with the mass fraction of H3PO4 in the range of (0 to 9) % and under temperature from (10 to 60)degrees C were measured. After a series of data processing, it is found that the measured viscosities are well correlated with the temperature and mass fraction of H3PO4 and fitted to regression equations. The result shows that the effect of the mass fraction of TBP in the mixture (TBP+TOA) on the viscosity of TBP+TOA+PA system is in the order of M1>M2>M3>M4(M for the ratio of TBP and TOA, M1 = 8:2, M2 = 7:3, M3 = 6:4, M4 = 5:5) under the same temperature and mass fraction of H3PO4. Meanwhile, with a series of studying on experimentation, the technical routes and parameters are optimized.