| Revue: | Brazilian journal of chemical engineering |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000308760 |
| ISSN: | 0104-6632 |
| Autores: | Saldaña, M.D.A1 Mohamed, R.S Mazzafera, P2 |
| Instituciones: | 1Universidade Estadual de Campinas, Faculdade de Engenharia Quimica, Campinas, Sao Paulo. Brasil 2Universidade Estadual de Campinas, Instituto de Biologia, Campinas, Sao Paulo. Brasil |
| Año: | 2000 |
| Periodo: | Sep |
| Volumen: | 17 |
| Número: | 3 |
| Paginación: | 251-260 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | Methylxanthines are alkaloids found in natural products such as tea, coffee and guaraná. These alkaloids are commonly used in cola drinks and pharmaceutical products due principally to their stimulant and diuretic effects on the human organism. In this work, experimental data on the supercritical CO2 extraction of caffeine, theophylline and theobromine from herbal maté tea, a beverage traditionally consumed by the gauchos of southern Brazil, the Argentine, Paraguay and Uruguay, were obtained using high pressure extraction equipment that allows adequate control of temperature and pressure. The continuous extraction/fractionation of maté tea leaves, Ilex paraguariensis in natura using carbon dioxide was carried out at 313.2 and 343.2 K and pressures of 13.8 and 25.5 MPa. Extraction/fractionation curves revealed the large influence of temperature and pressure on extraction yield. CO2 was also found to show a higher selectivity for caffeine than for theophylline and theobromine |
| Disciplinas: | Química |
| Palabras clave: | Ingeniería química, Extracción supercrítica, Dióxido de carbono, Metilxantinas, Teofilina, Cafeína, Teobromina, Ilex paraguariensis |
| Keyword: | Chemistry, Chemical engineering, Supercritical extraction, Carbon dioxide, Methylxanthines, Caffeine, Theobromine, Theophylline, Ilex paraguariensis |
| Texte intégral: | Texto completo (Ver HTML) |
