Journal
JOURNAL OF CHEMICAL THERMODYNAMICS
Volume 54, Issue -, Pages 316-321Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jct.2012.05.011
Keywords
Liquid-liquid extraction; Deterpenation; Citral; Essential oil; NRTL; UNIQUAC
Categories
Funding
- FAPESP (Fundacao de Amparo a Pesquisa do Estado de Sao Paulo [2006/05973-3, 2008/07326-0, 2009/07910-7, 2009/17271-1, 2010/20789-0, 2011/02476-7]
- CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico)
- CAPES (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [10/20789-0, 11/02476-7] Funding Source: FAPESP
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The fractioning of lemon essential oil can be performed by liquid-liquid extraction using hydrous ethanol as a solvent. A quaternary mixture composed of limonene, gamma-terpinene, beta-pinene, and citral was used to simulate lemon essential oil. In this paper, we present (liquid + liquid) equilibrium data that were experimentally determined for systems containing essential oil compounds, ethanol, and water at T = 298.2 K. The experimental data were correlated using the NRTL and UNIQUAC models, and the mean deviations between calculated and experimental data were less than 0.0053 in all systems, indicating the accuracy of these molecular models in describing our systems. The results show that as the water content in the solvent phase increased, the values of the distribution coefficients decreased, regardless of the type of compound studied. However, the oxygenated compound always showed the highest distribution coefficient among the components of the essential oil, thus making deterpenation of the lemon essential oil a feasible process. (C) 2012 Elsevier Ltd. All rights reserved.
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