ABSTRACT

A solid-phase extraction method has been developed for measuring low solubilities of hydrocarbons in water. The solubilities in water of methylcyclohexane, ethylcyclohexane, trans-1,2-dimethylcyclohexane, and a mixture of 1,2-dimethylcyclohexane isomers (respectively, 89.3 mol % and 10.7 mol % of the cis and trans isomers) were determined at temperatures ranging from (30 to 180) C. At 30 C, the mole fraction solubility is (2.96 ? 0.03) ? 10-6 for methylcyclohexane, (0.699 ? 0.007) ? 10-6 for ethylcyclohexane, and (0.80 ? 0.02) ? 10-6 for trans-1,2-dimethylcyclohexane. The mole fraction solubility is (1.09 ? 0.01) ? 10-6 and (0.91 ? 0.01) ? 10-6, respectively, for cis-1,2-dimethylcyclohexane and trans-1,2-dimethylcyclohexane (from the mixture). Temperature effect on solubility in water for ethylcyclohexane and for the dimethylcyclohexanes is very similar. Increasing the temperature from (30 to 180) C increases the solubilities by a factor of approximately 40.

Compounds

#	Formula	Name
1	C7H14	methylcyclohexane
2	H2O	water
3	C8H16	ethylcyclohexane
4	C8H16	trans-1,2-dimethylcyclohexane
5	C8H16	cis-1,2-dimethylcyclohexane

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 mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Chromatography	6
POMD	3 2	Mole fraction - 3 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Chromatography	6
POMD	4 2	Mole fraction - 4 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Chromatography	6
POMD	5 4 2	Mole fraction - 5 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1 Solvent: Mole fraction - 5; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Chromatography	6
POMD	5 4 2	Mole fraction - 4 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1 Solvent: Mole fraction - 5; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Chromatography	6

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

Solubilities of Alkylcyclohexanes in Water from 30 C to 180 C

Marche, C.[Celine], Ferronato, C.[Corinne], Jose, J.[Jacques]

ABSTRACT