Liquid-Liquid Equilibrium for the Binary Mixtures of α-Pinene + Water and α-Terpineol + Water
α-Pinene is the main component of the most
turpentine oils. The hydration of α-pinene with acid catalysts leads to
a complex mixture of monoterpenes. In order to obtain more valuable
products, the α-pinene in the turpentine can be hydrated in dilute
mineral acid solutions to produce α-terpineol. The design of
separation processes requires information on phase equilibrium and
related thermodynamic properties. This paper reports the results of
study on liquid-liquid equilibrium (LLE) of system containing α-
pinene + water and α-terpineol + water.
Binary LLE for α-pinene + water system, and α-terpineol + water
systems were determined by experiment at 301K and atmospheric
pressure. The two component mixture was stirred for about 30min,
then the mixture was left for about 2h for complete phase separation.
The composition of both phases was analyzed by using a Gas
Chromatograph. The experimental data were correlated by
considering both NRTL and UNIQUAC activity coefficient models.
The LLE data for the system of α-pinene + water and α-terpineol +
water were correlated successfully by the NRTL model. The
experimental data were not satisfactorily fitted by the UNIQUAC
model. The NRTL model (α =0.3) correlates the LLE data for the
system of α-pinene + water at 301K with RMSD of 0.0404%. And
the NRTL model (α =0.61) at 301K with RMSD of 0.0058 %. The
NRTL model (α =0.3) correlates the LLE data for the system of α-
terpineol + water at 301K with RMSD of 0.1487% and the NRTL
model (α =0.6) at 301K with RMSD of 0.0032%, between the
experimental and calculated mole fractions.
[1] Abrams, D.S., Prausnitz, J.M., 1975, "Statistical thermodynamics of
multi component liquid mixtures: A new expression for the excess Gibbs
energy of partly or completely miscible systems", AIChE J.,21, 116.
[2] Antosik, M., Stryjek, R., 1992, "Liquid-liquid equilibria in ternary ╬▒-
pinene + Δ3 carene + polar compound systems, Fluid Phase Equilibria,
71, 321-331.
[3] Arce, A., Marchiaro, A., and Soto, A., 2004, "Liquid-Liquid Equilibria
of Linalool + Ethanol +Water, Water + Ethanol + Limonene, and
Limonene + Linalool +Water Systems", Journal of solution chemistry,
Vol. 33, no.5
[4] Deliy, I.V., and Simakova, I.L.-Kinetics and Thermodynamic of Liquid
Phase Isomerization of ╬▒ and β- Pinene Over Pd/C Catalyst", React.
Kinet. Catal. Lett. 161-174 (2008) 95.
[5] Fredenslund, A., Gmehling, J., and Rasmussen, P.,1977, "Vapor-Liquid
Equilibria Using UNIFAC", Elsevier, Amsterdam.
[6] Li, H., Tamura, K., 2006, ÔÇÿTernary and quaternary (liquid-liquid)
equilibria for (water + ethanol + ╬▒-pinene, + β-pinene, or + limonene)
and ( water + ethanol + ╬▒-pinene + limonene) at the temperature 298.15
K", J.Chem. Thermodynamics 38, 1036-1041.
[7] Li, H., Tamura, K., 2008, ÔÇÿTernary liquid-liquid equilibria for (water +
terpene + 1-propanol or 1-butanol) systems at the temperature 298.15
K", Fluid Phase Equilibria 263, 223-230.
[8] Monteiro, J.L.F, and Veloso, C.O., Catalytic Conversion of Terpenes
Into Fine Chemicals, Topics in Catalysis. 1-4 (2004) 27.
[9] Renon, H., Prausnitz, J.M., 1968, "Local compositions in
thermodynamic excess functions for liquid mixtures", AIChE J., 14,
135-144.
[1] Abrams, D.S., Prausnitz, J.M., 1975, "Statistical thermodynamics of
multi component liquid mixtures: A new expression for the excess Gibbs
energy of partly or completely miscible systems", AIChE J.,21, 116.
[2] Antosik, M., Stryjek, R., 1992, "Liquid-liquid equilibria in ternary ╬▒-
pinene + Δ3 carene + polar compound systems, Fluid Phase Equilibria,
71, 321-331.
[3] Arce, A., Marchiaro, A., and Soto, A., 2004, "Liquid-Liquid Equilibria
of Linalool + Ethanol +Water, Water + Ethanol + Limonene, and
Limonene + Linalool +Water Systems", Journal of solution chemistry,
Vol. 33, no.5
[4] Deliy, I.V., and Simakova, I.L.-Kinetics and Thermodynamic of Liquid
Phase Isomerization of ╬▒ and β- Pinene Over Pd/C Catalyst", React.
Kinet. Catal. Lett. 161-174 (2008) 95.
[5] Fredenslund, A., Gmehling, J., and Rasmussen, P.,1977, "Vapor-Liquid
Equilibria Using UNIFAC", Elsevier, Amsterdam.
[6] Li, H., Tamura, K., 2006, ÔÇÿTernary and quaternary (liquid-liquid)
equilibria for (water + ethanol + ╬▒-pinene, + β-pinene, or + limonene)
and ( water + ethanol + ╬▒-pinene + limonene) at the temperature 298.15
K", J.Chem. Thermodynamics 38, 1036-1041.
[7] Li, H., Tamura, K., 2008, ÔÇÿTernary liquid-liquid equilibria for (water +
terpene + 1-propanol or 1-butanol) systems at the temperature 298.15
K", Fluid Phase Equilibria 263, 223-230.
[8] Monteiro, J.L.F, and Veloso, C.O., Catalytic Conversion of Terpenes
Into Fine Chemicals, Topics in Catalysis. 1-4 (2004) 27.
[9] Renon, H., Prausnitz, J.M., 1968, "Local compositions in
thermodynamic excess functions for liquid mixtures", AIChE J., 14,
135-144.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:62893", author = "Herti Utami and Sutijan and Roto and Wahyudi Budi Sediawan", title = "Liquid-Liquid Equilibrium for the Binary Mixtures of α-Pinene + Water and α-Terpineol + Water", abstract = "α-Pinene is the main component of the most
turpentine oils. The hydration of α-pinene with acid catalysts leads to
a complex mixture of monoterpenes. In order to obtain more valuable
products, the α-pinene in the turpentine can be hydrated in dilute
mineral acid solutions to produce α-terpineol. The design of
separation processes requires information on phase equilibrium and
related thermodynamic properties. This paper reports the results of
study on liquid-liquid equilibrium (LLE) of system containing α-
pinene + water and α-terpineol + water.
Binary LLE for α-pinene + water system, and α-terpineol + water
systems were determined by experiment at 301K and atmospheric
pressure. The two component mixture was stirred for about 30min,
then the mixture was left for about 2h for complete phase separation.
The composition of both phases was analyzed by using a Gas
Chromatograph. The experimental data were correlated by
considering both NRTL and UNIQUAC activity coefficient models.
The LLE data for the system of α-pinene + water and α-terpineol +
water were correlated successfully by the NRTL model. The
experimental data were not satisfactorily fitted by the UNIQUAC
model. The NRTL model (α =0.3) correlates the LLE data for the
system of α-pinene + water at 301K with RMSD of 0.0404%. And
the NRTL model (α =0.61) at 301K with RMSD of 0.0058 %. The
NRTL model (α =0.3) correlates the LLE data for the system of α-
terpineol + water at 301K with RMSD of 0.1487% and the NRTL
model (α =0.6) at 301K with RMSD of 0.0032%, between the
experimental and calculated mole fractions.", keywords = "α-Pinene, α-Terpineol, Liquid-liquid Equilibrium, NRTL model, UNIQUAC model", volume = "7", number = "6", pages = "452-4", }