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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

(Liquid plus liquid) equilibrium for systems composed of clove and allspice essential oil compounds and hydrous ethanol at T=298.2 K

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Koshima, Cristina C. [1] ; Umeda, Thayla K. [1] ; Nakamoto, Karina T. [1] ; Venancio, Larissa L. [1] ; Aracava, Keila K. [1] ; Rodrigues, Christianne E. C. [1]
Total Authors: 6
[1] Dept Food Engn ZEA FZEA, LES, POB 23, BR-13635900 Pirassununga, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF CHEMICAL THERMODYNAMICS; v. 95, p. 54-62, APR 2016.
Web of Science Citations: 8

In the deterpenation process of essential oils, a fraction enriched in oxyterpenes is obtained. When compared to terpenic hydrocarbons, this fraction is more stable and soluble in water, maintaining the characteristic flavor and fragrance of the crude oil. Solvent extraction is an interestingly popular technique that is proposed for the fractionation of essential oils (once it can be performed under atmospheric pressure and ambient temperature) and contributes to the maintenance of the sensory quality of essential oils. The use of hydrous ethanol as a solvent for the (liquid + liquid) extraction process has shown advantages when the components of interest are completely soluble in ethanol, and their partition can be adjusted based on the level of hydration of the solvent. In addition, for some purposes, the fractions obtained from the separation process can be used without removing the solvent. Therefore, the primary goal of this study was to investigate the (liquid + liquid) equilibrium at T = (298.2 +/- 0.1) K of model systems composed of (caryophyllene + eugenol + ethanol + water) (i. e., a clove essential oil model system) and (caryophyllene + methyl eugenol + eugenol + ethanol + water) (i. e., an allspice essential oil model system) to provide the information required for the proper design and optimization of the associated deterpenation processes. For both systems studied, it was noted that increased water content in the solvent decreases the extraction of the essential compounds and increases the selectivity of the solvent. Oxygenated compounds (e. g., methyl eugenol and eugenol) showed greater affinity for the solvent when compared to the sesquiterpenic hydrocarbon (e. g., caryophyllene). The experimental values were correlated using the NRTL thermodynamic model, which provided a satisfactory performance and low deviations in the phase composition descriptions with global deviations near 0.0050 (mass fraction). (C) 2015 Elsevier Ltd. All rights reserved. (AU)

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: 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: 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
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