Gardenia Flower is a kind of precious natural perfume. Its effective component, Gardenia flower essential oil, is used in various products as high-grade perfume.
It has the effects of clearing heat and purging fire, treating fever, relieving pressure, moisturizing and moisturizing skin.
Method of extracting essential oil
Petroleum ether extraction
The existing method of extracting essential oil from Gardenia flower is to extract gardenia flower with petroleum ether, add 36 times ethanol, cool and filter, remove insoluble wax, then cool to – 1525 degree C, filter and remove wax, then remove ethanol by vacuum distillation, that is, to get essential oil, the yield is usually 0. 05-0. 06%.
The disadvantages of this method are poor aroma, dark color, low yield, and the residual organic solution will have adverse effects on human body.
Supercritical CO2 extraction
In addition, supercritical CO2 extraction technology was also widely used in the extraction of spices in the 1980s.
Supercritical carbon dioxide extraction is a process of extracting and separating mixtures by using supercritical carbon dioxide as solvent and its high permeability and solubility.
Supercritical carbon dioxide extraction technology has the characteristics of good environment, safe operation, no harmful residues, high quality products and the ability to maintain the inherent odor.
However, in the process of production, it needs to be carried out under ultra-high pressure, high conditions and complex manufacturing process.
Supercritical CO2 extraction method of gardenia oil
Dried Gardenia: 250g
The gardenias were crushed to 20 meshes.
The best technological conditions for extracting gardenia oil are:
The extraction pressure is 25 MPa, the extraction temperature is 45 °C, the separation tank I pressure is 12 MPa, the separation tank I temperature is 45 °C, the separation tank II pressure is 6 MPa, and the separation tank II temperature is 50 °C.
According to the best process conditions, the gardenia oil is extracted to obtain 30 g of gardenia oil, and the yield is 12. 00% .