supercritical technology

Supercritical Fluid Extraction (SFE) is a new extraction method. Supercritical fluid is a state of matter between gas and liquid that is neither gaseous nor liquid. Its density and mass are much greater than that of gas, and it is basically similar to liquid, but its viscosity is closer to gas. Because CO2 gas has low critical temperature and critical pressure (31.06oC, 7.39MPa), and is colorless, odorless, nontoxic, easy to separate, and highly safe, it has become the most widely used ultraviolet gas. critical fluid. The supercritical CO2 extraction temperature is close to normal temperature and will not cause damage to temperature-sensitive substances during extraction. Moreover, the extraction process in an oxygen-free environment can ensure the stability of easily oxidized components in the product, which is especially suitable for the separation of active components of biological resources. It is very consistent with the requirements of green food development and is called "green separation technology."

Supercritical carbon dioxide has a special dissolving effect on some special natural products. By contacting supercritical carbon dioxide with the material to be separated, it can selectively extract components with polarity, boiling point and molecular weight in sequence. Then the supercritical fluid is turned into an ordinary gas by reducing pressure and raising temperature, and is recycled. The extracted substances are completely or substantially precipitated, thereby achieving the purpose of separation and purification.

Using supercritical carbon dioxide low-temperature extraction, it has no pollution to the environment and truly realizes a green production process.

Since carbon dioxide has very strong penetrating and dissolving power in the supercritical state, its extraction rate is also very high. Its extraction rate is high.

The operating temperature is low, the active medicinal ingredients are not destroyed, there is no organic solvent residue, and the process is simple.

The low extraction temperature can effectively prevent the oxidation and escape of heat-sensitive components, and maintain all effective biologically active components in the extract.

The critical CO2 fluid is a gas under normal conditions. After being separated from the extraction components, there is no solvent residue at all, effectively avoiding the toxic residue of solvents under traditional extraction conditions. At the same time, it also prevents the poisoning of the human body and the pollution of the environment during the extraction process, and is 100% natural.