ABSTRACT

The effect of various salts such as magnesium nitrate, calcium nitrate, zinc nitrate, and magnesium chloride on vapor liquid equilibrium (VLE) of the ethyl acetate ethanol system was studied experimentally in a modified Othmer still at atmospheric pressure. The influence of cation and anion of the salts on the VLE of the ethyl acetate ethanol system was examined. It was observed that the order of effect of salts for breaking the azeotrope was Zn(NO3)2 greater than Ca(NO3)2 greater than Mg(NO3)2 greater than MgCl2. Salting-out coefficients were calculated using the scaled particle theory. The experimental vapor liquid equilibrium data with salt was compared with that calculated using the scaled particle theory, and the agreement was satisfactory. Thus, it may be seen that the scaled particle theory can be used to estimate the salt effect of polar solvents in nonaqueous systems.

Compounds

#	Formula	Name
1	C4H8O2	ethyl acetate
2	C2H6O	ethanol
3	N2O6Zn	nitric acid, zinc salt
4	MgN2O6	magnesium nitrate
5	Cl2Mg	magnesium chloride
6	CaN2O6	calcium nitrate

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	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	1	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	1	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	2	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	2 3	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	16
POMD	2 4	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	15
POMD	2 5	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	13
POMD	2 1	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	11
POMD	2 1	Mole fraction - 1 ; Gas	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Gas Liquid	Index of refraction calibration data	11
POMD	2 1 3	Boiling temperature at pressure P, K ; Liquid	Mass fraction - 3; Liquid Solvent: Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	36
POMD	2 1 3	Mole fraction - 1 ; Gas	Solvent: Mole fraction - 1; Liquid Mass fraction - 3; Liquid	Pressure, kPa; Liquid	Gas Liquid	Index of refraction calibration data	36
POMD	2 1 6	Boiling temperature at pressure P, K ; Liquid	Mass fraction - 6; Liquid Solvent: Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Gas	Closed cell (Static) method	36
POMD	2 1 6	Mole fraction - 1 ; Gas	Solvent: Mole fraction - 1; Liquid Mass fraction - 6; Liquid	Pressure, kPa; Liquid	Gas Liquid	Index of refraction calibration data	36
POMD	2 1 4	Boiling temperature at pressure P, K ; Liquid	Mass fraction - 4; Liquid Solvent: Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Gas	Closed cell (Static) method	45
POMD	2 1 4	Mole fraction - 1 ; Gas	Solvent: Mole fraction - 1; Liquid Mass fraction - 4; Liquid	Pressure, kPa; Liquid	Gas Liquid	Index of refraction calibration data	45
POMD	2 1 5	Boiling temperature at pressure P, K ; Liquid	Mass fraction - 5; Liquid Solvent: Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Gas	Closed cell (Static) method	36
POMD	2 1 5	Mole fraction - 1 ; Gas	Solvent: Mole fraction - 1; Liquid Mass fraction - 5; Liquid	Pressure, kPa; Liquid	Gas Liquid	Index of refraction calibration data	36

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

Effect of Inorganic Salts on the Isobaric Vapor Liquid Equilibrium of the Ethyl Acetate Ethanol System

Dhanalakshmi, J., Sai, P. S. T., Balakrishnan, A. R.

ABSTRACT