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What are the extraction methods for tea tree essential oil?

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It uses leaves and tender shoots as raw materials and is extracted by steam distillation, with an oil yield of about 1.8%.

How to extract tea tree essential oil:

A method for extracting tea tree essential oil, characterized in that it comprises the following steps:

(1) Raw material collection: select fresh tea tree leaves and fresh tender shoots, with a ratio of tea tree leaves to tender shoots of 3:1;

(2) Impurity removal and drying: sterilize the cleaned tea tree leaves and tender shoots, remove impurities after sterilization, then dry until the moisture content does not exceed 12%;

(3) Grinding: grind the tea tree leaves and tender shoots from step 2 to obtain a powder;

(4) Add water to the powder from step 3, treat with ultrasound for 20 min to 65 min, then add an organic solvent weighing 2 to 5 times its weight, and let stand at 20°C for 1 h to obtain a mixed solution;

(5) Place the mixed liquid treated in step 4 into a steam distillation apparatus for steam extraction, with a distillation temperature of 80°C to 90°C and a distillation time of 2 to 3 h;

(6) Cool the crude product collected after step 5 in a cooler, with a cooling temperature of 20°C to 30°C;

(7) Pass the cooled crude product into a separator for centrifugation and oil-water separation to obtain tea tree essential oil.

2. The method for extracting Australian tea tree essential oil according to claim 1, characterized in that in step 2, according to different particle size requirements, powders of different particle sizes are obtained by sieving through 30 to 150 mesh.

3. The method for extracting Australian tea tree essential oil according to claim 1, characterized in that the organic solvent in step 4 is anhydrous ethanol or petroleum ether.

4. The method for extracting Australian tea tree essential oil according to claim 1, characterized in that the powder after grinding in step 3 is irradiated with LED light: specifically, a light exposure time of 15-28 min, a light intensity of 16-32 lx, and a light color temperature of 5500-6000 K, and then step 5 is carried out.

5. The method for extracting Australian tea tree essential oil according to claim 1, characterized in that in step 2, the tea tree leaves and tender shoots are soaked in saline solution with a concentration of 10% for sterilization treatment.




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