How to get the best CO2 extraction process?
The main factors affecting the yield of Boswellia volatile oil in supercritical extraction are the pressure of the extraction tank, the temperature of the extraction tank and the extraction time.
The effect of extraction kettle pressure on the yield of frankincense oil. The extraction temperature was set to 50 ℃, and the extraction time was 1.5 h. The pressure effect was investigated. There were significant differences between the levels of extraction kettle pressure. However, from the actual consideration of production, the extraction pressure was finally determined to be 30 MPa.
Set the pressure of the extraction kettle to 30 MPa and extract for 1.5 h. Check the pressure and temperature.
The higher the temperature, the better the extraction of frankincense oil. This is because temperature increase accelerates the movement of frankincense oil molecules, decreases viscosity, and increases fluidity, which is conducive to the dissolution and diffusion of frankincense oil.
There is no significant difference between the extraction conditions at 55 ℃ and 60 ℃, so the extraction temperature is determined to be 55 ℃.
time to extract
Based on the above experimental research, the pressure of the extraction kettle is set to 30 MPa, the temperature is 55 ℃, and the optimal extraction time is preferred.
After 1.5 hours of extraction, Boswellia serrata produces oil slowly, and there is no significant difference between extraction for 2 hours and 1.5 hours.
To save energy and increase efficiency, the extraction time is determined to be 1.5 h. From the above data, it can be concluded that the optimal process conditions are: the pressure of the extraction vessel is 30 MPa, the temperature of the extraction vessel is 55 ℃, and the extraction time is 1.5 h.