Distillation
The most common method of extracting essential oils worldwide is
distillation. During distillation, fragrant plants, release their
essential oil through evaporation. When the vapor pressure of liquids is
equal to ambient pressure, it is converted to vapor and by indirect
cooling with water, condensed the vapor mixture (oil and water). from
the condenser, the distilled liquid flows into a separator, where oil
separates from water [7, 9, 18, 20]. Types of distillation methods
include hydro (water)-distillation, steam distillation, dry distillation
and vacuum distillation.