Supercritical carbon dioxide fluid has the characteristics of normal temperature, non-toxicity, environmental friendliness, safe and convenient use, short extraction time and good product quality.
Characteristics of supercritical carbon dioxide fluids:
1. The critical temperature of carbon dioxide is 31.3 ° C, close to room temperature, the critical pressure is 7.37 MPa, the critical conditions are easy to implement, and the entire extraction and separation process can be completed at near room temperature.
2. The critical density of carbon dioxide is 448kg/m3, which is the highest among commonly used supercritical extractants.
3. In the supercritical state, carbon dioxide has strong penetrating power, good fluidity, and a fast transfer rate of solute, which can greatly shorten the extraction time of the target substance.
4, carbon dioxide is non-toxic, tasteless, chemically inert, does not pollute the environment and products, supercritical carbon dioxide has antioxidant and sterilization effects, it is easy to separate from the extraction products, there is no solvent residue in the product and residue, the extraction product The quality is good and the residue can be used without treatment.
5, carbon dioxide is cheap and easy to obtain, non-flammable, explosive, safe to use.
6. Supercritical carbon dioxide fluid extraction combines extraction and separation into one, which can greatly shorten the process and is easy to operate.
In short, the supercritical carbon dioxide fluid has the characteristics of normal temperature, non-toxicity, environmental friendliness, safe and convenient use, short extraction time and good product quality.
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