Hello friends! In the last article you came to know about what is
Sandalwood oil, its uses, benefits and everything about it.
Today, in this article we’ll tell you how Sandalwood oil is extracted.
Sandalwood oil is extracted by many methods. Distillation methods
vary, ranging from today’s steam distillation to the more traditional hydro
(water) distillation and also including CO2 extraction.
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Let’s understand these 3 methods one by one:
1.) The CO2 extraction method:
CO2 extracts, also known as
supercritical CO2 extracts or supercritical fluid CO2 extracts are pure plant
extracts produced from a fairly new and highly efficient extraction process.
CO2 extracts are similar to essential oils and can be used in aromatherapy or
perfumery. The CO2 extraction method involves pumping pressurized carbon
dioxide into a chamber filled with the sandalwood’s powdered heartwood. When
carbon dioxide is subjected to pressure it possesses liquid properties while
remaining in a gaseous state. Because of these liquid properties of the gas,
the CO2 acts as a solvent, releasing the sandalwood oil from the wood.
1.)
Hydro – Distillation:
It is the traditional method used in
extraction of sandalwood oil. The oil extracted is of good quality though this
method is not very popular and in not in much use these days. Instead of steam
passing through the powdered wood, in hydro distillation the powdered wood is
immersed in water to soak. The water is then boiled, often heated over an
open fire. The Sandalwood essential oil eventually floats to the surface, above
the hydrosol, where it can be collected.
2.) Steam Distillation: Now a days, it is the most used and preferred
method for extraction of Sandalwood Essential Oil by many companies as it
produces the best quality of the oil. In
this process steam heated at extremely high temperature is passed through the
powdered wood. The steam releases the sandalwood essential oil that is locked
within the cellular structure of the wood. The mixture of steam and oil then
flows through a condenser and cools, yielding a layer of oil and a layer of
water. The sandalwood essential oil separates from the hydrosol (floral water)
rises to the top so it can then be collected.
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