ISHS Acta Horticulturae 503: II WOCMAP Congress Medicinal and Aromatic Plants, Part 4: Industrial Processing, Standards & Regulations, Quality, Marketing, Economics
EXTRACTION OF ROSA MOSQUETA (ROSA AFF. RUBIGINOSA) OIL WITH DENSE FLUIDS |
| Authors: | G.D. Mabe, G.M. Foco, E.A. Brignole, S.B. Bottini |
| Keywords: | Rosa Aff Rubiginosa, oil, near-critical extraction, thermodynamic modelling |
| Abstract:
The use of compressed or liquefied gases as solvents, in extraction and fractionation processes, presents a potential application in pharmaceutical and food industries. Similarly to traditional liquid solvents, non-toxic gases such as carbon dioxide, applied at quasi-critical conditions, are able to dissolve non-volatile substances at relatively low temperatures. Their volatility facilitates its later elimination from the extract, leaving a final product with a very low level of residual solvent. In this study, the solubility of rosa mosqueta oil in super-critical carbon dioxide was determined, at temperatures between 40° and 60°C and pressures in the range of 70 to 100 bar. The effects of pressure and temperature on the solubility behaviour have been evaluated, and the changes in phase miscibilities observed, in order to analyse the viability of a continuous or batch process to obtain oil from oil-seeds. The results of high-pressure extractions with carbon dioxide and propane, are compared with the traditional, low-pressure extraction process with hexane, on the basis of the yield and quality of the extract, and the solubility of the oil in the solvents. | |
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