The optimum conditions of Lavender essential oil extracted by supercritical CO2 extraction process: extraction pressure 22 MPa, extraction temperature 45 °C, extraction time of 1 h, and the factors influence on the extraction rate is: extraction pressure> extraction temperature> extraction time.
The experimental results show that when the absolute ethanol as co-solvent was used and the particle size was 120 μm, the extraction temperature was 70 °C, the extraction pressure was 30 MPa, the extract yield reached 3.58% and the TI of the extract was 3319.13 U/g.
The parameters of the model were estimated by multiple linear regression (MLR) providing a mathematical model able to predict the concentration of vitamin E as a function of extraction pressure and temperature when neat CO2 was used as extractant.
The optimal conditions for extracting chlorogenic acid and cynaroside were as follows: ethanol concentration, 60%; extraction pressure, 400 MPa; extraction time, 2 min; extraction temperature, 30 °C; and the solid/liquid ratio, 1 : 50.
The effects of extraction pressure and temperature on the yields and the compositions of the extracts were investigated by using a two-factor central composite rotatable design experiment.
Smaller particles were produced with increasing extraction pressure and temperature.
Extraction pressure and ethanol percentage were the main factors influencing the yield of the target compounds.
The extraction pressure will be limited by security cautions and, just such ethanol percentage, by operational costs.
In the turbine model, a parameter M is defined as the intermediate variable to calculate the extraction pressure of turbine.
Simulation under changed operating conditions is conducted through the use of expressions that correlate the temperature and enthalpy of the steam as a function of the extraction pressure.
A decrease in the particle size of chitosan was found with increasing extraction pressure and temperature along with a decreasing of nozzle diameter.
