Your CO2 (carbon dioxide) extraction way of essential oils is usually called CO2 extraction or supercritical abbreviation. In short, CO2 extraction is extracted by pressurized carbon dioxide until it becomes an important point in liquid condition. The liquid carbon dioxide then acts as a solvent to obtain herbal plant matter and volatile oil content and dissolve the co2 in the liquid. And then, the CO 2 is brought to natural pressurization, the co2 evaporates back to it's gaseous state and what remains will be resulting oily substance.
This pair of extraction methods using "high demand and low temperature" began inside 1980s. Its instruments and equipment are complicated and expensive, plus its essential oils tend to be labeled "CO2 Extraction". This extraction method is executed in a closed reaction tank inside the whole process, and the time required is very small, as long as some time (the distillation method requires no less than 1 hour).
advantage:
Balanced with the solvent extraction system, this extraction method won't have any solvent remains.
Carbon dioxide extracts commonly smell thicker than distilled critical oils and often stench closer to natural lawn. Carbon dioxide extract continues to be said to contain additional components than those extracted through the same plant using heavy steam distillation. This seems in making sense, because carbon dioxide extracts are frequently thicker oils and often find a way to have a more detailed aroma.
This method can be a highly specialized extraction approach. Due to the volatilization belonging to the solvent, the essential oil features no solvent impurities and also the separation is relatively thorough. The extracted molecules could be larger than those taken by distillation. There is a situation to get explained. The distillation method uses steam to bring out aromatic molecules, but larger molecules is not extracted, such as your diterpene molecules in clary sage. This really is already the limit, that is certainly to say 20 It really is rarely seen that terpenes having three carbon atoms usually are extracted by distillation.
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