ABSTRACT

The liquid-liwuid phase equilibria of substituted perfluoro-n-octane (1Br-perfluoro-n-octane, 1H-perfluoro-n-octane, 1H, 8H-perfluoro-n-octane) + n-octane were experimentally determined by turbidimetry in the temperature range between 270 K and 330 K and at the vapor pressure of the mixture. The measured equilibrium data were correlated with an equation derived from renormalization group (RG) theory and with soft-SAFT Equation of State. The LLE data of the binary mixtures of n-octane + substituted perfluoro-n-octane were compared with n-octane data. The results indicate an increasing solubility with 1 Br-perfluoro-n-octane and show that the introduction of second hydrogen atom has almost no effect on phase equilibrium.

Compounds

#	Formula	Name
1	C8H18	octane
2	C8BrF17	1-bromoperfluorooctane
3	C8HF17	1H-perfluorooctane
4	C8H2F16	1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-hexadecafluorooctane

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	Phase	Method	#Points
POMD	1 2	Triple point temperature, K ; Liquid mixture 1	Mole fraction - 1; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	VISOBS	9
POMD	1 3	Triple point temperature, K ; Liquid mixture 1	Mole fraction - 1; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	VISOBS	6
POMD	1 4	Triple point temperature, K ; Liquid mixture 1	Mole fraction - 1; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	VISOBS	6

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

liquid-liquid equilibrium of substituted perfluoro-n-octane + n-octane systems

Varanda, F. R.[Fatima R.], Vega, L.[Lourdes], Coutinho, J. A. P.[Joao A. P.], Marrucho, I. M.[Isabel M.]

ABSTRACT