Extraction Sans Solvant Assistée par Micro-ondes
Conception et Application à l'extraction des huiles essentielles

Abstract : Solvent-Free Microwave Extraction (SFME) is a new extraction process developed at the Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments of Université de La Réunion. SFME is a combination of traditional extraction technique and an innovative technology, microwave heating. Indeed, although the cohobation and trapping systems of mixing essential water-oil vapor resemble Hydro-Distillation (HD), microwave heating reduces extraction delays considerably and removes the need for water or solvent.
When we compared SFME and HD oil extraction on aromatic herbs and spices, we found that, herb extraction times from leaves are greatly reduced (up to seven times less) using SFME, spice yields are higher using HD. However, substantially higher amounts of oxygenated compounds, the most valuable in terms of fragrance, are present in the essential oils extracted by SFME when compared with HD.
Scanning Electronic Microscope techniques showed that using microwaves contributes to an almost instantaneous release of essential oils from the glandular hairs and cells. Difference in essential oil composition between ESSAM and HD could be explained by solubility phenomena.
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Submitted on : Thursday, December 7, 2006 - 9:27:58 AM
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Marie-Elisabeth Lucchesi. Extraction Sans Solvant Assistée par Micro-ondes
Conception et Application à l'extraction des huiles essentielles. Autre. Université de la Réunion, 2005. Français. ⟨tel-00118895⟩

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