ABSTRACT

This paper describes the extraction of C5 C8 linear a-olefins from olefin/paraffin mixtures of the same carbon number via a reversible complexation with a silver salt (silver bis(trifluoromethylsulfonyl)imide, Ag[Tf2N]) to form room temperature ionic liquids [Ag(olefin)x][Tf2N]. From the experimental (liquid + liquid) equilibrium data for the olefin/paraffin mixtures and Ag[Tf2N], 1-pentene showed the best separation performance while C7 and C8 olefins could only be separated from the corresponding mixtures on addition of water which also improves the selectivity at lower carbon numbers like the C5 and C6, for example. Using infrared and Raman spectroscopy of the complex and Ag[Tf2N] saturated by olefin, the mechanism of the extraction was found to be based on both chemical complexation and the physical solubility of the olefin in the ionic liquid ([Ag(olefin)x][Tf2N]). These experiments further support the use of such extraction techniques for the separation of olefins from paraffins

Compounds

#	Formula	Name
1	C2AgF6NO4S2	silver bis(trifluoromethanesulfonyl)amide
2	C5H10	1-pentene
3	C5H12	pentane
4	C6H12	hex-1-ene
5	C6H14	hexane
6	C7H14	1-heptene
7	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	2 7 1	Mole fraction - 2 ; Liquid mixture 1	Solvent: Mole fraction - 7; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	NMR	5
POMD	4 7 1	Mole fraction - 4 ; Liquid mixture 1	Solvent: Mole fraction - 7; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	NMR	5
POMD	6 7 1	Mole fraction - 6 ; Liquid mixture 1	Solvent: Mole fraction - 7; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	NMR	5
POMD	3 2 1	Mole fraction - 3 ; Liquid mixture 2 Mole fraction - 3 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 1	Mole fraction - 2; Liquid mixture 2	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	NMR NMR NMR	8
POMD	5 4 1	Mole fraction - 5 ; Liquid mixture 1 Mole fraction - 5 ; Liquid mixture 2 Mole fraction - 4 ; Liquid mixture 2	Mole fraction - 4; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	NMR NMR NMR	8
POMD	2 1	Mole fraction - 2 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1		Liquid mixture 1 Liquid mixture 2	NMR	1
POMD	4 1	Mole fraction - 4 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1		Liquid mixture 1 Liquid mixture 2	NMR	1

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Use of water in aiding olefin/paraffin (liquid + liquid) extraction via complexation with a silver bis(trifluoromethylsulfonyl)imide salt

Wang, Y.[Yu], Thompson, J.[Jillian], Zhou, J.[Jingjing], Goodrich, P.[Peter], Atilhan, M.[Mert], Pensado, A. S.[Alfonso S.], Kirchner, B.[Barbara], Rooney, D.[David], Jacquemin, J.[Johan], Khraisheh, M.[Majeda]

ABSTRACT