Solvent extraction

Solvent extraction is being used for delicate plants and flowers and for parts that yield low amounts of essential oil. Through this process, the non-volatile plant material such as waxes and pigments are also extracted into the essential oil but many experts still consider these oils suitable for aromatherapy.

“Supercritical carbon dioxide extraction” is a new method to separate various components from the plant which according to several experts it produces a pure, clean, and safe essential oil while others view it critically. These essential oils are very expensive and hard to find because this method requires expensive equipment.