ABSTRACT

The solubility of diosgenin in four pure imidazolium-based ionic liquids, including [C4mim]NO3 (1-butyl-3-methylimidazolium nitrate), [C2mim]NTf2 (1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide), [C4mim]NTf2 (1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide), and [C8mim]NTf2 (1-octyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide), were determined in the temperature range from (312.85 to 363.95) K at atmospheric pressure via a laser monitoring observation method. The solubility of diosgenin in the selected ionic liquids increased with increasing temperature. Diosgenin was especially soluble in [C8mim]NTf2, with a mole fraction of (0.287 1.630) * 10 3 at (312.85 to 332.25) K. The experimental data were successfully correlated using the dual-parameter empirical equation, Apelblat equation, and ?h equation.

Compounds

#	Formula	Name
1	C27H42O3	Diosgenin
2	C8H15N3O3	1-butyl-3-methylimidazolium nitrate
3	C8H11F6N3O4S2	1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide
4	C10H15F6N3O4S2	1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide
5	C14H23F6N3O4S2	1-octyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide

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 2	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Laser monitoring method	6
POMD	1 3	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Laser monitoring method	4
POMD	1 4	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Laser monitoring method	6
POMD	1 5	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Laser monitoring method	6

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

Solubility of diosgenin in several imidazolium-based ionic liquids

Ge, L.[Li], Guo, L.[Liangchi], Yang, K.[Kedi], Tao, K.[Kejia], Su, J.[Jing], Long, Y.[Yunfei]

ABSTRACT