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US 8,802,021 B2Granted
Microwave integrated Soxhlet
AssigneesMilestone Co., Ltd., Universite D'Avignon Et Des Pays De Vaucluse
InventorsFarid Chemat, Valerie Tomao, Francesco Visinoni
Life of this patent
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Abstract
The present invention relates to a new method of extraction of solid compounds by microwaves and to the apparatus used in said method.
Claims25
A device suitable for the extraction of solid material by microwave irradiation, said device comprising
- (a) a microwave oven having an upper surface,
- (b) a base vessel having a bottom placed in the microwave oven, said base vessel containing a polytetrafluoroethylene/graphite compound in the form of a stir bar and/or particles and an inner support for placing the solid material to be extracted, said inner support being placed at a defined distance above the bottom of said vessel, and
- (c) an extraction tube placed on top of the base vessel comprising a side arm provided with at least one valve and at least one opening, the microwave oven being provided with an opening on its upper surface such that the extraction tube extends from inside the microwave oven to outside the microwave oven.
A method for the extraction of solid material, the method comprising the steps of:
- (a) placing the solid material to be extracted and a solvent in a base vessel having a bottom, said solid material being placed on a support placed at a defined distance above the bottom of said vessel,
- said solvent being, when starting the method, in a quantity sufficient to immerse the solid material,
- (b) subjecting said base vessel, provided with a polytetrafluoroethylene/graphite compound in the form of a stir bar and/or particles, to microwave irradiation, the microwave irradiation being the only heating source and causing at least partial evaporation of the solvent into an extraction tube,
- (c) removing said evaporated solvent such that the solvent in the base vessel no longer immerses said support and solid material, and
- (d) collecting extracts of the solid material directly from the bottom of the base vessel.
2 more elements
Dependencies are inferred from the claim text.