Knowledge explanation of Supercritical Co2 Extraction Equipment
The substance is in 3 forms of gas, liquid and solid, which can be converted at different pressures and temperatures. At a temperature higher than a certain value, any large pressure can not make the pure matter from the gas phase into the liquid phase, at this time the temperature is called the critical temperature tc, and at the temperature, the gas can be liquefied by the minimum pressure is called critical pressure pc. The substance is in a supercritical state when the temperature of the substance is higher than the critical pressure. In a pressure-temperature diagram, a region above the critical temperature and critical pressure is called a supercritical region, and if the fluid is heated or compressed to the state of its critical (Tc) and critical pressure (Pc), The gas is pressurized, the gas does not liquefy, but the density increases, has a similar liquid property, and also retains the gas properties,
The fluid in this state is called a supercritical fluid. The solvent strength of supercritical fluids depends on the temperature and pressure of the Extraction. Using this feature, simply change the fluid pressure and temperature of the extractant, you can put the different components of the sample in the fluid solubility of the size, successively extracted, in the low-pressure under the weak polarity of the substance first extracted, with the increase of pressure, polarity and the large molecular weight of the material and basic properties, so in the program boost under Supercritical extraction,
Different extraction components are available and can also act as a Separation. The principle of extracting and separating using Supercritical Co2 Extraction Equipment device is to use supercritical carbon dioxide to have special dissolution effect on some special natural products, and to use the relationship between the dissolution capacity of supercritical carbon dioxide and its density, that is, the effect of pressure and temperature on the dissolution ability of supercritical carbon dioxide.
In supercritical state, the supercritical carbon dioxide is contacted with the material to be separated, so that it selectively extracts the components of polarity, boiling point and molecular weight of different sizes.
Supercritical extraction (SCE) operates at near normal temperature, and its energy consumption is lower than that of ordinary distillation. It is suitable for the separation of heat-sensitive substances and oxidizable substances. Its heat transfer rate is fast and the temperature is easy to control. The characteristics of Supercritical Co2 Extraction Equipment determine its wide application scope.