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- W2010346505 abstract "Processing of wood into manufactured products generate significant amounts of residues. These residues usually are just dispensed, harming the environment and wasting the opportunity of making good use of part of the wood. In this study residual wood from Mezilaurus itauba was employed to produce natural extract of high aggregated value using supercritical fluid. The yield and composition of the extracts from supercritical fluid extraction were compared to the ones obtained using conventional extraction techniques (soxhlet and hydrodistillation), as well as when ethanol was applied as a co-solvent with the supercritical fluid. Supercritical extraction was performed at a pressure range from 8 to 22 MPa, temperatures between 38 and 52 °C, solvent density varying from 241 to 839.91 kg/m3 and 3 mL/min flow. The greatest yield in supercritical extraction was of 1.04% for a extraction setting of 22 MPa and 45 °C. The experiments using ethanol at 2, 5 and 8% concentrations in volume as co-solvent showed up to 1.56% yield in mass. The extractions by hydrodistillation and soxhlet were of 0.04 and 5.47% respectively. Important compounds were identified in the extracts of M. itauba, in its majority sesquiterpenes, and of special highlight α-Cadinol, T-muurolol, β-Cubebene β-Cariofilene, Germacrene-D, δ-Cadinene, Naphtalene, α-Copaene and β-Bisabulene. For the kinetic description of the extraction using supercritical fluid the mass transfer models of Sovová and Martínez were employed, as well as the empiric model of Barton. These three models showed similar errors for the evaluation metrics (mean squared error and average absolute relative deviation)." @default.
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- W2010346505 date "2014-11-01" @default.
- W2010346505 modified "2023-09-26" @default.
- W2010346505 title "Supercritical extraction of residues Mezilaurus itauba and application of mathematical models" @default.
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- W2010346505 doi "https://doi.org/10.1016/j.supflu.2014.08.008" @default.
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