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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.)

Physical Behavior of the Phases from the Liquid-Liquid Equilibrium of Citrus Essential Oils Systems at 298.2 K

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Goncalves, Daniel [1] ; Paludetti, Mayara F. [1] ; Florido, Priscila M. [1] ; Tonetti, Camila [1] ; Goncalves, Cintia B. [1] ; Rodrigues, Christianne E. C. [1]
Total Authors: 6
[1] Univ Sao Paulo, Dept Food Engn ZEA FZEA, LES, Ave Duque de Caxias Norte 225, BR-13635900 Pirassununga - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF CHEMICAL AND ENGINEERING DATA; v. 63, n. 8, p. 2718-2737, AUG 2018.
Web of Science Citations: 1

Solvent extraction is a fractionation process applied to separate terpenes and oxygenated compounds from citrus essential oils (EOs). Once the knowledge of the physical properties of phases was found to be crucial for equipment design and the scaling of tubes and accessories, this study focused on the evaluation of density, viscosity, and interfacial tension of phases from the liquid-liquid equilibrium of citrus EO systems. Model mixtures of orange and lemon EOs and real systems at 298.2 K were prepared, and the physical properties of their phases were thus evaluated. Increased water content in the solvent led to higher values of density, viscosity, and interfacial tension, whereas an increased amount of oxygenated compounds caused lower interfacial tensions. Densities estimated by the simple mixing rule provided good results. Parameters of the Grunberg-Nissan model adjusted to the model systems data exhibited a good description of the viscosities of real systems. The UNIFAC-VISCO model provided suitable predictions of viscosities of the solvent phases, and satisfactory results for the interfacial tensions were calculated by linear adjustment and the Bahramian Danesh thermodynamic model, except for the real acid lime system. (AU)

FAPESP's process: 13/11150-3 - Citrus essential oils fractionation using ethanol with different water contents as solvents: phase equilibrium, physical properties and continuous equipment extraction
Grantee:Daniel Gonçalves
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 14/22272-5 - Experimental determination of interfacial tension of phases in equilibrium of model systems composed by orange or acid lime essential oil, ethanol and water, at 25 °C
Grantee:Mayara Fregonezi Paludetti
Support Opportunities: Scholarships in Brazil - Scientific Initiation