Essential oil extraction methods

Typically, essential oil extraction methods include:

Steam Distillation

The most common method where steam is passed through plant material to vaporize the volatile compounds, which are then condensed back into liquid form

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Cold Pressing

Used primarily for citrus peels where the fruit skins are mechanically pressed to extract the oils.

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Solvent Extraction

Involving the use of solvents that dissolve plant components, which are then evaporated to leave behind the essential oils.

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CO2 Extraction

A newer method that uses pressurized carbon dioxide to pull the desired phytochemicals from the plant. When the pressure is released, CO2 evaporates, leaving behind the extract.

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Cryo-distillation

The method involving freezing herbs and slowly warming them could be a specialized form of what’s sometimes referred to as Cryo-distillation or a similar cryogenic process. These techniques are less common and typically used in laboratory settings or very specialized industrial applications. They are noted for their ability to preserve heat-sensitive compounds that might otherwise degrade during traditional distillation processes.