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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

Texto completo
Autor(es):
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]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Dept Food Engn ZEA FZEA, LES, POB 23, BR-13635900 Pirassununga, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF CHEMICAL THERMODYNAMICS; v. 95, p. 54-62, APR 2016.
Citações Web of Science: 8
Resumo

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)

Processo FAPESP: 10/20789-0 - Fracionamento de óleos essenciais por extração líquido-líquido em coluna de discos rotativos perfurados: estudo experimental e simulação do processo
Beneficiário:Cristina Chiyoda Koshima
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 12/15317-7 - Estudo do equilíbrio líquido-líquido de sistemas compostos por óleo essencial de bergamota e solvente alcoólico
Beneficiário:Karina Thiemi Nakamoto
Linha de fomento: Bolsas no Brasil - Iniciação Científica
Processo FAPESP: 11/02476-7 - Desterpenação de óleos essenciais por extração líquido-líquido: estudo experimental e simulação do processo
Beneficiário:Christianne Elisabete da Costa Rodrigues
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 12/15323-7 - Estudo do equilíbrio líquido-líquido de sistemas compostos por componentes do óleo essencial da pimenta da Jamaica e solvente etanólico
Beneficiário:Thayla Karla Umeda
Linha de fomento: Bolsas no Brasil - Iniciação Científica