ABSTRACT

The equilibrium data of quaternary system phosphoric acid + sodium chloride + water + tri-n-butyl phosphate (TBP) was discussed at 298.15 K and atmospheric pressure. It was investigated experimentally in the mass concentration range 0 15% of NaCl and 4 24% of H3PO4 in the initial aqueous phase. The experimental results show that the separation factor of H2O and the distribution coefficient of H3PO4 increase when the content of H3PO4 increases. The separation factor of NaCl decreases after an increase to a maximum value. Moreover, it was found out that the mass ratio of ternary system H3PO4 NaCl H2O to the saturation point. It would separate easily when the mass percent of NaCl occupies more than 12% in the system. The experimental tie-line data was correlated with the nonrandom two-liquid activity coefficient model.

Compounds

#	Formula	Name
1	H3O4P	phosphoric acid
2	H2O	water
3	C12H27O4P	tributyl phosphate

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	3 1 2	Mass density, kg/m3 ; Liquid	Mass fraction - 1; Liquid Mass fraction - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Pycnometric method	12
POMD	3 1 2	Mass fraction - 2 ; Liquid mixture 2 Mass fraction - 2 ; Liquid mixture 1 Mass fraction - 1 ; Liquid mixture 1	Mass fraction - 1; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1	Liquid mixture 2 Liquid mixture 1	OTHER OTHER OTHER	6

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Liquid Liquid Equilibria for the Quaternary System H3PO4-NaCl-H2O-TBP at 298.15 K

Liu, C.[Chengqi], Ren, Y.[Yongsheng], Wang, Y.[Ya'nan]

ABSTRACT