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http://hdl.handle.net/10773/20389
Title: | Prospective pathway for a green and enhanced friedelin production through supercritical fluid extraction of Quercus cerris cork |
Author: | Sen, Ali de Melo, Marcelo M. R. Silvestre, Armando J. D. Pereira, Helena Silva, Carlos M. |
Keywords: | EUCALYPTUS-GLOBULUS BARK RESPONSE-SURFACE METHODOLOGY TRITERPENIC ACIDS CHEMICAL-COMPOSITION CARBON-DIOXIDE BY-PRODUCTS EXPERIMENTAL-DESIGN SUBER L. CO2 OPTIMIZATION |
Issue Date: | 2015 |
Publisher: | ELSEVIER SCIENCE BV |
Abstract: | Supercritical fluid extraction (SFE) was applied for the first time to Quercus cerris cork, and compared with Soxhlet with dichloromethane (DCM). Novel triterpenes, viz. betulin and squalene, and beta-sitosterol were identified for the first time in the lipophilic extracts. The SFE at 300 bar and 40-80 degrees C provided extracts much richer in friedelin-the major compound from both SFE and DCM extracts - with concentrations up to 40.6 wt%, against 26.0 wt% for DCM. The SFE yields ranged between 0.97 and 1.81 wt% with pure CO2, and attained 2.83 wt% when ethanol was introduced as cosolvent (10 wt%). In this case, however, the friedelin concentration dropped significantly due to the additional removal of non-target compounds. In general, the experimental data and their trends were in accordance with the theoretical predictions of kinetic and equilibrium properties estimated in this work for the friedelin/SC-CO2 system. This study demonstrates that the SFE of Q cerris cork arises as a prospective pathway for a green and enhanced friedelin production process under the biorefinery concept. (C) 2014 Elsevier B.V. All rights reserved. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/20389 |
DOI: | 10.1016/j.supflu.2014.12.008 |
ISSN: | 0896-8446 |
Publisher Version: | 10.1016/j.supflu.2014.12.008 |
Appears in Collections: | CICECO - Artigos |
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Prospective pathway for a green and enhanced friedelin production through supercritical fluid extraction of Quercus cerris cork_10.1016j.supflu.2014.12.008.pdf | 922.01 kB | Adobe PDF |
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