Principle analysis of CO2 extraction technology!
Supercritical CO2 extraction technology is carried out by using the relationship between the solubility of supercritical fluid and its density, that is, using the influence of pressure and temperature on the solubility of supercritical fluid.
CO2 extraction technology is to contact the supercritical fluid with the substance to be separated in the supercritical state, so that it selectively extracts the components of polarity, boiling point and molecular weight in turn. Of course, the extract obtained corresponding to each pressure range cannot be single, but the conditions can be controlled to obtain the best proportion of mixed components, and then with the help of pressure reduction, heating method to make the supercritical fluid into ordinary gas, the extracted substance is completely or basically precipitated, so as to achieve the purpose of separation and purification, so the supercritical CO2 fluid extraction process is a combination of extraction and separation process.
CO2 extraction technology pressure and temperature can be used to adjust the parameters of the extraction process, by changing the temperature and pressure to achieve the purpose of extraction, pressure fixation by changing the temperature can also separate the material; On the contrary, the temperature is fixed and the extract is separated by reducing the pressure, so the process is simple and easy to master, and the extraction speed is fast.
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