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Supercritical extraction mostly uses carbon dioxide at high pressure to extract the high value products from natural materials. Unlike other processes, the extraction process leaves no solvent residue behind. Moreover the CO2 is non-toxic, non-flammable, odorless, tasteless, inert, and inexpensive. Due to its low critical temperature 31°C, carbon dioxide is known to be perfectly adapted in food, aromas, essential oils and nutraceutical industry. |
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Supercritical Fluid Extraction Process |
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The schematic process diagram shown above describes the "classical" batch extraction process. The equipment is composed of one or several extractors consisting in high pressure autoclave(s) with fast-opening systems in which the material to be treated is set inside a “ basket ” easy to put in and to remove, and a separation section where extract and fluid are separated prior to fluid recycle through condensation and liquid pumping. The major issue of such operation is the fact that it is a batch process.
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SEPATEK can now proposes a continuous extraction process on solid material. Very encouraging results are obtained on continuous extraction at high pressure (on hops, caraway...) |
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Some examples of extracted molecules |
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Supercritical Extraction of natural products |
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Among the dozens of natural products extracted in SEPATEK since 30 years, we can mention coriander, black pepper, basil, paprika, marjoram, celery, curcuma, pimento, vanilla, cinnamon, ginseng, peanut, sunflower... The picture here below shows the aspect of four extracts. |
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Many molecules can be extracted or refined by supercritical fluid processes : colorants (deodorization of blue color from red cabbage juice, orange color from pot marigold flower, carotenoids from palm oil or shellfish or carrots…), antioxidant preservatives (deodorization of rosemary extract), or texture agents (lecithin purification from vegetal oil). fish oils or derivatives deodorized and purified by SFF; moreover, some stuffs are treated for elimination of pesticides (ginseng) or toxaphenes (fish oils);
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Some examples of deodorization/purification
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Pesticides extraction from Ginseng roots |
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Allergens elimination form rose extracts |
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Chlorophenol and chloroanisol from corks |
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 实验室超临界萃取仪 中试超临界萃取设备 工业超临界萃取设备 |
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