Deterpenation of eucalyptus essential oil by liquid plus liquid extraction: Phase equilibrium and physical properties for model systems at T=298.2 K

Author(s)

Goncalves, Daniel ^[1] ; Koshima, Cristina Chiyoda ^[1] ; Nakamoto, Karina Thiemi ^[1] ; Umeda, Thayla Karla ^[1] ; Aracava, Keila Kazue ^[1] ; Goncalves, Cintia Bernardo ^[1] ; da Costa Rodrigues, Christianne Elisabete ^[1]

Affiliation

^[1] Univ Sao Paulo, Separat Engn Lab LES, Dept Food Engn ZEA FZEA, BR-13635900 Pirassununga, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF CHEMICAL THERMODYNAMICS; v. 69, p. 66-72, FEB 2014.
• Web of Science Citations: 15

Abstract

As the principal source in Brazil of eucalyptus essential oil extracts, Eucalyptus citriodora contains citronellal, an oxygenated compound responsible for the flavour characteristics. Deterpenation processes, consisting of the removal of terpenic hydrocarbons with the subsequent concentration of the oxygenated compounds, can be used to improve the aromatic characteristics of this essential oil. The purpose of this work was to perform a study of the technical feasibility of using a liquid + liquid extraction process to deterpenate eucalyptus essential oil. Model systems with various mixtures of limonene and citronellal (representing eucalyptus essential oil) as well as solvent (ethanol with various water mass fractions) were used to obtain liquid + liquid equilibrium data. The raffinate and extract phases were also analyzed to characterize the physical properties (density and viscosity). The equilibrium data were used to adjust the NRTL and UNIQUAC parameters. Two empirical models, the simple mixing rule and the GrunbergNissan model, were evaluated for use in the descriptions of the densities and viscosities, respectively, of the samples. Increasing the water content in the solvent resulted in decreases in the limonene and citronellal distribution coefficients, with consequential increases in the solvent selectivity values. Increasing values of the densities and viscosities, especially for the solvent-rich phases, were associated with systems using high amounts of hydrated ethanolic solvents. (C) 2013 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 11/02476-7 - Essential oils deterpenation by solvent extraction: experimental study and process simulation
• Grantee: Christianne Elisabete da Costa Rodrigues
• Support Opportunities: Regular Research Grants
• FAPESP's process: 10/20789-0 - Deterpenation of essential oils by liquid-liquid extraction using a perforated rotating disc column: experimental study and process simulation
• Grantee: Cristina Chiyoda Koshima
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 12/23203-1 - Viscosities and densities of systems of interest to the oil industry and biodiesel production: experimental data, modeling and prediction
• Grantee: Cintia Bernardo Gonçalves
• Support Opportunities: Regular Research Grants
• FAPESP's process: 10/13286-1 - Study of Deterpenation Process of Citrus Essential Oils: Liquid-liquid Equilibrium Data and Extraction in Perforated Rotating Discs Contactor
• Grantee: Daniel Gonçalves
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 12/15323-7 - Study of liquid-liquid equilibrium of the systems composed by components of allspice essential oil and alcoholic solvent
• Grantee: Thayla Karla Umeda
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 12/15317-7 - Liquid-liquid equilibrium data of systems composed by bergamot essential oil and alcoholic solvents
• Grantee: Karina Thiemi Nakamoto
• Support Opportunities: Scholarships in Brazil - Scientific Initiation