ABSTRACT

For the purpose of separating nitrogen compounds, pyrrole and indole, N-methylformamide (NMF) was selected as the extractive solvent. The liquid liquid equilibrium (LLE) data for {NMF + pyrrole/indole + alkanes} systems were measured at 298.15 K under atmospheric pressure of 101.3 kPa. The triangular diagrams of the above eight systems, {NMF + pyrrole/indole + n-hexane/n-heptane/n-decane/n-dodecane}, were classified as Treybal s type I. Meanwhile, the nonrandom two-liquid (NRTL) and universal quasi-chemical (UNIQUAC) activity coefficient models were applied to correlate the LLE data, and the UNIQUAC model shows better agreement than the NRTL model. In addition, the distribution constant and selectivity factor were calculated on the basis of the experimental data and utilized to investigate the extraction capabilities of NMF for pyrrole and indole.

Compounds

#	Formula	Name
1	C2H5NO	N-methylformamide
2	C4H5N	pyrrole
3	C8H7N	1H-indole
4	C6H14	hexane
5	C7H16	heptane
6	C10H22	decane
7	C12H26	dodecane

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 4	Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 2	Mole fraction - 2; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Chromatography Chromatography Chromatography	9
POMD	1 2 5	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 1	Mole fraction - 2; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	Chromatography Chromatography Chromatography	8
POMD	1 2 6	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 1	Mole fraction - 2; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	Chromatography Chromatography Chromatography	9
POMD	1 2 7	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 1	Mole fraction - 2; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	Chromatography Chromatography Chromatography	8
POMD	1 3 4	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 3 ; Liquid mixture 1	Mole fraction - 3; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	Chromatography Chromatography Chromatography	9
POMD	1 3 5	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 3 ; Liquid mixture 1	Mole fraction - 3; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	Chromatography Chromatography Chromatography	8
POMD	1 3 6	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 3 ; Liquid mixture 1	Mole fraction - 3; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	Chromatography Chromatography Chromatography	9
POMD	1 3 7	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 3 ; Liquid mixture 1	Mole fraction - 3; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	Chromatography Chromatography Chromatography	9
POMD	1 4	Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2		Liquid mixture 1 Liquid mixture 2	Chromatography	1
POMD	1 4	Mole fraction - 1 ; Liquid mixture 2	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2		Liquid mixture 2 Liquid mixture 1	Chromatography	1
POMD	1 5	Mole fraction - 1 ; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 2		Liquid mixture 2 Liquid mixture 1	Chromatography	1
POMD	1 5	Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 2		Liquid mixture 1 Liquid mixture 2	Chromatography	1
POMD	1 6	Mole fraction - 1 ; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 2		Liquid mixture 2 Liquid mixture 1	Chromatography	1
POMD	1 6	Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 2		Liquid mixture 1 Liquid mixture 2	Chromatography	1
POMD	1 7	Mole fraction - 1 ; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 2		Liquid mixture 2 Liquid mixture 1	Chromatography	1
POMD	1 7	Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 2		Liquid mixture 1 Liquid mixture 2	Chromatography	1

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

Liquid-Liquid Equilibrium for Ternary Systems of N-Methylformamide + Pyrrole/Indole + Alkanes at 298.15 K: Phase Equilibrium Measurement and Correlation

Cha, X.[Xingchang], Gao, J.[Jun], Zhang, Y.[Yi], Cui, Z.[Ziqi], Xu, D.[Dongmei], Zhang, L.[Lianzheng], Wang, Y.[Yinglong]

ABSTRACT