ABSTRACT

The extraction of benzene from heptane by the solvents such as N,N-dimethylformamide (DMF), propylene carbonate, and complex solvent (DMF + propylene carbonate) were researched. The liquid liquid equilibrium (LLE) data were experimentally obtained for the ternary systems heptane + benzene + DMF and heptane + benzene + propylene carbonate at 313.2 K and atmospheric pressure and for the quaternary systems heptane + benzene + DMF + propylene carbonate at (303.2, 313.2, and 323.2) K and atmospheric pressure. The nonrandom two-liquid (NRTL) and universal quasichemical activity coefficient (UNIQUAC) models were used to correlate the LLE data satisfactorily, and the selectivity and distribution coefficients of benzene were calculated. Due to its high selectivity and suitable distribution coefficient, DMF + propylene carbonate can be used as a potential extracting solvent to separate benzene from heptane.

Compounds

#	Formula	Name
1	C6H6	benzene
2	C7H16	heptane
3	C3H7NO	dimethylformamide
4	C4H6O3	4-methyl-1,3-dioxolan-2-one

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	Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 2 ; Liquid mixture 2	Mole fraction - 2; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Chromatography Chromatography Chromatography	6
POMD	1 4 2	Mole fraction - 2 ; Liquid mixture 1 Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 2 ; Liquid mixture 2	Mole fraction - 1; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Chromatography Chromatography Chromatography	7
POMD	3 2	Mole fraction - 2 ; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2		Liquid mixture 1 Liquid mixture 2	Chromatography	1
POMD	3 2	Mole fraction - 2 ; Liquid mixture 2	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2		Liquid mixture 2 Liquid mixture 1	Chromatography	1
POMD	4 2	Mole fraction - 2 ; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2		Liquid mixture 1 Liquid mixture 2	Chromatography	1
POMD	4 2	Mole fraction - 2 ; Liquid mixture 2	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2		Liquid mixture 2 Liquid mixture 1	Chromatography	1

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

Liquid Liquid Equilibria for the Systems: Heptane + Benzene + Solvent (Propylene carbonate, N,N-Dimethylformamide, or Mixtures) at Temperatures from (303.2 to 323.2) K

Li, J.-j.[Jing-jing], Zhao, Q.-s.[Qian-shu], Tang, X.-d.[Xiao-dong], Xiao, K.-l.[Kun-liang], Yuan, J.-y.[Jiao-yang]

ABSTRACT