| Revista: | Brazilian journal of chemical engineering |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000308761 |
| ISSN: | 0104-6632 |
| Autores: | Valle, J.M. del1 Bello, S Thiel, J2 Allen, A3 Chordia, L |
| Instituciones: | 1Pontificia Universidad Católica de Chile, Departamento de Química, Santiago de Chile. Chile 2Novbeltec S.A., Santiago de Chile. Chile 3Thar Designs, Pittsburgh, Pensilvania. Estados Unidos de América |
| Año: | 2000 |
| Periodo: | Sep |
| Volumen: | 17 |
| Número: | 3 |
| Paginación: | 335-348 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | Supercritical CO2 (SCO2) can be utilized to extract oils from a number of plant materials as a nontoxic alternative to hexane, and there is industrial interest in using SCO2 extraction to obtain high-quality oils for cosmetics and other high-value applications. A possible substrate is rosehip (Rosa aff. rubiginosa) seed. The scope of our work was to select SCO2 extraction conditions and to compare cold-pressed, hexane-extracted and SCO2-extracted rosehip oil. We used a fractional factorial experimental design with extraction temperature (T, 40-60 °C), extraction pressure (p, 300-500 bar) and dynamic extraction time (t, 90-270 min) as independent variables and yield and color as response variables. Samples of 100 g flaked rosehip seeds were extracted with 21 g CO2/min, following a static extraction (15 min adjustment) period. Resulting data were analyzed using response surface methodology. Extracted oil (4.7-7.1% in our experimental region) increased slightly with p and more pronouncedly with T and specially t. On the other hand, the photometric color index was independent of t but worsened (increased) as a result of an increase in either p or specially T. We extracted five batches of 250 g seeds with 21 g CO2/min at 40 °C and 300 bar for 270 min and compared the oil with samples obtained by solvent extraction (a batch of 2.5 kg of laminated seeds was treated with 10 L hexane and rotaevaporated until there was virtually no residual hexane) and cold pressing, by determining color, fatty acid composition, iodine index and saponificati |
| Disciplinas: | Química |
| Palabras clave: | Ingeniería química, Extracción supercrítica, Dióxido de carbono, Semillas, Rosa mosqueta, Extracción de aceite, Metodología de superficie de respuesta, Rosea rubiginosa |
| Keyword: | Chemistry, Chemical engineering, Supercritical extraction, Carbon dioxide, Seeds, Rosehip, Oil extraction, Response surface methodology, Rosa rubiginosa |
| Texto completo: | Texto completo (Ver HTML) |
