Supercritical fluid extraction (SFE) is a technology that uses supercritical fluid as an extractant to separate one component (extract) from another component (matrix).
The basic principle of supercritical fluid extraction is to dissolve the required chemical components with supercritical fluid under conditions above the critical temperature and critical pressure, and then reduce the pressure of the fluid solution or increase the temperature of the fluid solution, so that the solute dissolved in the supercritical fluid precipitates due to its reduced density and solubility, thereby achieving the extraction of specific solutes.
Supercritical fluid extraction technology is a new separation technology in modern chemical separation. Supercritical extraction uses CO2 as a solvent, because CO2 fluid in a supercritical state has a greater density and dielectric constant, and has a greater solubility for substances. When the temperature and temperature change, its solubility will change suddenly. Therefore, not only is the solubility of certain substances selective, but the separation of solvent and extract is also easy.
The supercritical CO2 extraction device can be used for high-pressure and suitable temperature extraction materials (solids and liquids) under the condition of separator replacement, so that the soluble materials can decompose the target products during the extraction and separation process.
The entire supercritical CO2 extraction device system includes an extractor, a separator, a CO2 high-pressure pump, a co-solvent pump, a cooling system, a heat exchange system, a CO2 storage tank, a liquid level meter, a purification filter system, a flow meter, a temperature control system, a safety protection system, etc. All major mechanical and auxiliary equipment can meet the requirements of the supercritical extraction system and process flow.
Main Features Of Supercritical Carbon Dioxide Extraction Equipment:
- Low critical temperature, suitable for the extraction and purification of heat-sensitive compounds.
- Able to provide an inert environment to avoid product oxidation and affect the effective content of the extract.
- Non-toxic, non-flammable, safe to use, and no pollution to the environment.
- No solvent residue, no nitrates and heavy metal ions.
- Carbon dioxide can be recycled and reused.
- Pressure and temperature can be designed according to requirements.
Conclusion
Supercritical CO2 fluid extraction technology is a new separation technology in modern chemical separation. It has the characteristics of fast mass transfer rate, strong penetration ability, high extraction efficiency and low operating temperature. This technology has been widely used in medicine, food, chemical industry and other industries.