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Home Page > Health > Alternative Medicine > Essential Oil Extraction Process- Distillation

Essential Oil Extraction Process- Distillation

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Posted: Jul 28, 2008 |Comments: 0
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Steam Distillation

The majority of essential oils available today are extracted using a steam distillation process. It’s the oldest form of essential oil extraction and is believed by many to be the only way oils should be extracted. The process really is quite simple and as long as this extraction process is closely monitored, the steam will remain at a temperature that won’t damage the plants.

 The desired plant material is placed onto a still. A still is a specialized piece of equipment that is used in the distillation process. It consists of a vessel into which heat is added and a device that is used for cooling. The plant is first placed into the vessel. Next steam is added and passed through the plant. The heat from the steam helps to open the pockets of the plant that contain the plant’s aromatic molecules or oils. Once open, the plant releases these aromatic molecules and in this state, the fragrant molecules are able to rise along with the steam.

The vapors carrying these molecules travel within a closed system towards the cooling device. Cold water is used to cool the vapors. As they cool, they condense and transform into a liquid state. The liquid is collected in a container and as with any type of oil/water mixture, it separates. The oils float towards the top while the water settles below. From there, it’s a simple matter of removing the oils that have been separated. These are the highly condensed, aromatic oils used in aromatherapy.

The water is not discarded, however. The water, which also contains the plant’s aroma along with the other parts of the plant that are water soluble, are the hydrosols – a milder form of the essential oils. These, too are also used in aromatherapy.

When steam is used, it’s created at a pressure higher than that of the atmosphere. The boiling point is above 100 degrees Celsius and creates an extraction process that is safe and fast. If the temperature is allowed to become too hot, however, the plant material as well as its essential oils can easily become damaged.

Water Distillation

Water distillation involves placing the desired plant material in a still and then submerging it in water. The water is then brought to a boil. The heat helps open the pockets containing the plant’s aromatic molecules so they can be extracted. The vapors cool and condense, the essential oils separate from the water and they’re collected.

The water in this case provides protection for the plant because it acts as a barrier. Less pressure is used as well as a lower temperature than that which is used in the steam distillation method. This extraction method works well with plants that cannot tolerate high heat.

Other distillation methods

Hydro distillation is similar to steam distillation. The only difference is that instead of introducing the heat from the bottom and up through the still, as happens in steam distillation, the heat passes into the still from the top. It’s cooled from below, which makes collection of the essential oils easier. This method actually results in a higher yield of essential oils because less steam and consequently less processing time are involved.

In a water/steam combination distillation method, plant material is submerged into heated water and steam is forced through the water, opening the pockets containing the aroma molecules. When cooled, the essential oils condense and are collected as described above.

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About the Author:

Dr. John Spencer Ellis

Each week, over one million people enjoy a fitness and wellness program created by John Spencer Ellis. His programs are implemented in the top resorts, spas and health clubs. John is the CEO of NESTA (National Exercise & Sports Trainers Association), the Spencer Institute for Life Coaching, and the Get America Fit Foundation.

He created Adventure Boot Camp, the largest fitness boot camp system in the world. His TriActive America signature series of outdoor exercise equipment is used worldwide. John has been featured on ABC, NBC, CBS, PBS, FOX, FOX Sports, FOX Reality, SPIKE and ESPN. He is the fitness and lifestyle expert on Bravo’s The Real Housewives of Orange County and Daybreak OC (KDOC news). John is the producer of the documentary The Compass (Jan. 2009).

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My 4 yr old lab is on grain free diet. Allergies are acting up with flaky skin along her spine. Not overly itchy, just flaky. What essential oils can I use to bathe or spray on her to condition skin?
I am in a process of importing olive oil in India how do i get the quality of my olive oil checked in Delhi
What is natural process of ‘withering’ in the ocean for reducing oil toxicity

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aromatherapy, essential oils, extraction, distillation, alternative medicine, stress management, spa treatment, relaxation, health, fitness, wellness, stress reduction, john spencer ellis, health expert

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