ABSTRACT

We report herein the solid liquid equilibria (SLE) of N,N-dimethylacetamide (DMA) + MCl (M = Na, K, Rb, and Cs) + H2O ternary systems for the first time. At the three given temperatures (T = 298.15 K, 308.15 K, and 318.15 K), the solubilities, densities, and refractive indices for these ternary systems are determined with the mass fraction of DMA in salt-free solvent system ranging from 0.0 to 1.0. The solubility of salts decreases significantly with the addition of DMA, and the salting-out ratios are calculated accordingly. The nonrandom two-liquid (NRTL) model can effectively fit the experimental solubility. Furthermore, to investigate the temperature effect on the SLE, the dynamic solubility measurement system is selected to determine the solubility of the salts in the mixed solvent (wDMA = 0.3, 0.5, and 0.7) with the temperature continuously increased. The solubility data at multiple temperatures are well fitted by the modified Apelblat equation and the ?h equation.

Compounds

#	Formula	Name
1	ClNa	sodium chloride
2	ClK	potassium chloride
3	ClRb	rubidium chloride
4	ClCs	cesium chloride
5	C4H9NO	N,N-dimethylethanamide
6	H2O	water

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	5 1 6	Mass fraction - 1 ; Liquid	Temperature, K; Liquid Solvent: Mass fraction - 5; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	TITR:UFactor:4	33
POMD	5 1 6	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Solvent: Mass fraction - 5; Liquid Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	ABBE:UFactor:6	33
POMD	5 1 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Solvent: Mass fraction - 5; Liquid Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:64	33
POMD	5 2 6	Mass fraction - 2 ; Liquid	Temperature, K; Liquid Solvent: Mass fraction - 5; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	TITR:UFactor:4	33
POMD	5 2 6	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Solvent: Mass fraction - 5; Liquid Mass fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	ABBE:UFactor:6	33
POMD	5 2 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Solvent: Mass fraction - 5; Liquid Mass fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:64	33
POMD	5 6 3	Mass fraction - 3 ; Liquid	Temperature, K; Liquid Solvent: Mass fraction - 5; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 3	TITR:UFactor:12	33
POMD	5 6 3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Solvent: Mass fraction - 5; Liquid Mass fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	ABBE:UFactor:6	33
POMD	5 6 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Solvent: Mass fraction - 5; Liquid Mass fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:64	33
POMD	5 4 6	Mass fraction - 4 ; Liquid	Temperature, K; Liquid Solvent: Mass fraction - 5; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 4	TITR:UFactor:8	33
POMD	5 4 6	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Solvent: Mass fraction - 5; Liquid Mass fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	ABBE:UFactor:6	33
POMD	5 4 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Solvent: Mass fraction - 5; Liquid Mass fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:64	33
POMD	1 6	Mass fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	TITR:UFactor:4	3
POMD	1 6	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	ABBE:UFactor:6	3
POMD	1 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:64	3
POMD	5 1	Mass fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	TITR:UFactor:4	3
POMD	5 1	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	ABBE:UFactor:6	3
POMD	5 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:64	3
POMD	2 6	Mass fraction - 2 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	TITR:UFactor:4	3
POMD	2 6	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Mass fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	ABBE:UFactor:6	3
POMD	2 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:64	3
POMD	5 2	Mass fraction - 2 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	TITR:UFactor:4	3
POMD	5 2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Mass fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	ABBE:UFactor:6	3
POMD	5 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:64	3
POMD	6 3	Mass fraction - 3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 3	TITR:UFactor:12	3
POMD	6 3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	ABBE:UFactor:6	3
POMD	6 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:64	3
POMD	5 3	Mass fraction - 3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 3	TITR:UFactor:12	3
POMD	5 3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	ABBE:UFactor:6	3
POMD	5 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:64	3
POMD	4 6	Mass fraction - 4 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 4	TITR:UFactor:8	3
POMD	4 6	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Mass fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	ABBE:UFactor:6	3
POMD	4 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:64	3
POMD	5 4	Mass fraction - 4 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 4	TITR:UFactor:8	3
POMD	5 4	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Mass fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	ABBE:UFactor:6	3
POMD	5 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:64	3

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

Solid Liquid Equilibrium (SLE) of the N,N-Dimethylacetamide (DMA) + MCl (M = Na, K, Rb, and Cs) + Water Ternary Systems at Multiple Temperatures

Zhao, D.[Dandan], Li, S.[Shuni], Zhai, Q.-G.[Quan-Guo], Jiang, Y.[Yucheng], Hu, M.[Mancheng]

ABSTRACT