Supercritical carbon dioxide extraction (SFE for short) is a rapidly developing new green separation technology. Supercritical CO2 extraction uses CO2 as a solvent. The CO2 fluid in supercritical state has a large density and dielectric constant, and has many substances. Very strong dissolving power, the separation rate is much faster than liquid extraction, and changes rapidly with changes in pressure and temperature. Therefore, not only the solubility of certain substances is selective, but the solvent and extract are easy to separate.
Compared with conventional separation methods, supercritical carbon dioxide extraction has the characteristics of low extraction temperature, strong selectivity, high efficiency, low energy consumption, and no pollution. It is especially suitable for the extraction of fat-soluble, high-boiling, and heat-sensitive substances, and it is also suitable for the extraction of different components. Fine separation. Widely used in industries such as biopharmaceuticals, food industry, health products, cosmetics and fragrances.
Supercritical extraction process：
The CO2 in the low-temperature CO2 storage tank is pumped into the condenser through the CO2 delivery pump and flows into the CO2 storage tank for storage.The liquid CO2 is pressurized to a certain pressure by the CO2 pressurizing pump (performed by the production process requirements), enters the extraction heater to heat the liquid CO2 to about 50℃ (performed by the production process requirements), and the CO2 in the supercritical state enters In the extraction kettle where the materials have been loaded, when the supercritical CO2 extracts the materials in the extraction kettle, after reaching the set process parameters, the CO2 of the extract is carried into the separation kettle for separation, and the desired product is separated.The gaseous CO2 enters the circulation pipeline for circulation extraction. The entire process is automatically controlled, which greatly improves the safety of the equipment.