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.