Monday, June 25, 2007

Fragrant tree extraction process liberates essential oils

Fragrant tree extraction process liberates essential oils

Vietnamese scientists have single-handedly increased the value of the Eaglewood tree by extracting its essential oils, which can be used in everything form pharmaceutics and medicines to cosmetics.
Scientists at the Ho Chi Minh City Institute of Chemistry Sciences have discovered how to obtain the essential oil by a supercritical fluid CO2 extraction process using the tree, scientific name Aquilaria Agallocha, Aquilaria agallwha Roxb, or Agarwood (or Do Bau in Vietnamese).
It takes around 30-45 minutes to complete extraction of a batch of Do bau essentials oil, which can be sold at a price of US$10,000 – 14,000 per liter.
The process consists of pumping pressurized carbon dioxide into a chamber filled with plant matter. When carbon dioxide is subjected to pressure it becomes ‘supercritical’ and has liquid properties while remaining in a gaseous state.
Because of the liquid properties of the gas, the CO2 functions as a solvent, it pulls the oils and other substances such as pigment and resin from the plant matter. The temperature involved in the supercritical extraction process is around 95 to 100 degrees Fahrenheit (37 C degrees).
Currently, Vietnam has around 8,000 hectares of eaglewood trees spanning from the north to the south, with the area to be expanded by about 4,000 hectares a year.
The eaglewood tree matures after ten years and during the period, it requires a total investment of VND380 million ($23,750) to take care of one hectare, normally with 1,000 trees.
Besides being used as a herbal treatment, eaglewood essential oil could also be used in processing perfume, and aroma therapy.
Reported by Quang Thuan – Translated by Minh Phat

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