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Principle of carbon dioxide supercritical fluid extraction technology
Release time:
2019/05/23
The principle of supercritical CO2 fluid extraction (SFE) separation process is based on the relationship between the solubility of supercritical fluid and its density, that is, the effect of pressure and temperature on the solubility of supercritical fluid.
The principle of supercritical CO2 fluid extraction (SFE) separation process is based on the relationship between the solubility of supercritical fluid and its density, that is, the effect of pressure and temperature on the solubility of supercritical fluid.
In the supercritical state, the supercritical fluid is contacted with the substance to be separated, so that it selectively extracts the components of polarity, boiling point and molecular weight. Of course, the extract obtained corresponding to each pressure range cannot be single, but the conditions can be controlled to obtain a good proportion of mixed components, and then the supercritical fluid is changed into ordinary gas by means of decompression and heating, and the extracted substance is completely or basically precipitated, thus achieving the purpose of separation and purification. Therefore, the supercritical CO2 fluid extraction process is composed of extraction and separation processes.
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