i want to know the method to elaborate essencial oils?!
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Various extraction methods are used in the manufacturing of essential oils, and the method used is normally dependant on what type of botanical material is being used.
It is the type of plant material that determines which method will be used to obtain the essential oil. But there are exceptions - for instance - CO2 is a great way to extract most oils, but the cost involved in following this method, would place it out of the financial reach of most people.
Although the extraction of essential oils may sound only to be of technical interest, it is one of the key points which determines the quality of the oil that is used, since a wrong, or wrongly executed extraction, can damage the oil, and alter the chemical signature of the essential oil.
Extraction methods
Underneath a list and short explanation of the different extraction methods used in the manufacture of essential oils as found on this website.
Distillation
Distillation converts the volatile liquid (the essential oils) into a vapor and then condenses the vapor back into a liquid - it is the most popular, and cost effective method in use today in producing essential oils.
Water distillation
Steam distillation
Hydro diffusion
Other specialized distillation
Cohobation
Rectification
Water and steam distillation
Fractional distillation
Expression
Expression is a cold pressed method of extraction, which is mostly used in the extraction of citrus essential oils.
Sponge expression
Écuelle à piquer
Machine abrasion
Solvent extraction
With solvent extraction, solvents are used to coax the essential oils out of the botanical material, and various ways are also employed.
Maceration
Enfleurage
Solvent
Hypercritical carbon dioxide CO2
Other Answers:
elaborate? perhaps you mean extract. To extract essential oils - it depends on the herb/plant matter you're extracting from and what you intend to do with the extract. Some plants do well using an alcohol (100 proof vodka, for one example). Others work best using a carrier oil like apricot kernel or grapeseed.
Most essential oil extractions should take place in a dark, cool, dry environment, and should occur over the course of several weeks (unless the item is perishable).
I would consult a book on essential oils and their preparation.
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