ApplicationNo./PatentNo.: 2005 10027485
The invention discloses a method for extracting lavender essential oil, which comprises the following steps: a, chopping or mashing lavender raw materials to 5-40 meshes, putting into an extraction kettle, raising the temperature of the extraction kettle to 30-55 DEG C, b, introducing CO2 in a supercritical state into the extraction kettle, and pressurizing to 20-40 MPa；; Lavender is extracted circularly at the flow rate of 10-25 kg/h, the pressure of the separation kettle is 5- 10 MPa, the temperature is 40-60℃, and after 1.0-4.0h, the extract is discharged from the bottom of the separation kettle, and the lavender essential oil is obtained after standing for oil-water separation. The invention utilizes the advantages of high density, low viscosity and high diffusion coefficient of supercritical CO2 fluid to quickly extract plant essential oil from lavender raw materials at near normal temperature, and has simple operation and high efficiency. Aromatic essential oils extracted from lavender and lavender flowers, stems and leaves can be used to prepare daily necessities, cosmetics, medicines and so on, and have a wide range of uses.