1. Extraction and separation are combined into one. When the supercritical fluid of carbon dioxide containing dissolved substances flows through the separator, the pressure drop causes CO2 and the extract to quickly become two phases (gas-liquid separation) and immediately separate. There is no phase change process of the material, and solvent recovery is not required, making the operation convenient; Not only does it have high extraction efficiency, but it also consumes less energy, saving costs.

2. Pressure and temperature can both serve as parameters for regulating the extraction process. Near the critical point, small changes in temperature and pressure can cause significant changes in CO2 density, resulting in changes in the solubility of the extracted material. Extraction can be achieved by controlling temperature or pressure. Fixed pressure, changing temperature can separate substances; On the contrary, if the temperature is fixed, reduce the pressure to separate the extract; Therefore, the process flow is short and time-consuming. Non polluting to the environment, recyclable extraction fluid, truly achieving green production process.

3. The extraction temperature is low, the critical temperature of CO2 is 31.265C, and the critical pressure is
7.18MPa， It can effectively prevent the oxidation and dispersion of thermosensitive components, retain their biological activity intact, and extract high boiling point, low volatility, and easily pyrolytic substances below their boiling point temperature.

4. Under normal conditions, the critical CO2 fluid is a gas, non-toxic, and completely free of solvent residue after separation from the extracted components, effectively avoiding the residual toxicity of solvents under traditional extraction conditions. At the same time, it also prevents the extraction process from being toxic to the human body and polluting the environment, making it 100% natural.

5. The polarity of supercritical fluids can be changed. Under certain temperature conditions, different polarities of substances can be extracted by changing the pressure or adding suitable entrainers, with a wide range of choices.