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What are the main impacts of supercritical extraction?
Extraction pressure is one of the most important parameters of SFE. When the extraction temperature is unchanged, the pressure increases, the fluid density increases, the solvent strength increases, and the solvent solubility increases. Different substances, its extraction pressure will be very different.
The effect of temperature on the solubility of supercritical fluids is complex. Under a certain pressure, the volatility of the extract increases with the increase of temperature, which increases the concentration of the extract in the supercritical gas phase, thereby increasing the amount of extraction; On the other hand, as the temperature increases, the density of the supercritical fluid decreases, resulting in a decrease in solubility and extraction amount. So we should pay attention to both aspects.
The particle size of the raw material can affect the extraction recovery rate, reduce the particle size of the raw material, increase the contact area between the solid and the solvent, and thus improve the extraction speed. However, if the particle size is too small or too fine, it will not only seriously block the screen, but also cause the filter at the outlet of the extractor to be blocked.
The solvent extracted by supercritical fluid has non-polarity and weak polarity, and has high solubility for lipophilic substances and low solubility for substances with greater polarity. Therefore, a certain amount of polar components (i.e. entrainers) should be added, which can change the polarity of supercritical CO2 fluids and make them more widely used.
Nantong Ruizhi Supercritical Technology Development Co., Ltd. is a high-tech company committed to the integration of supercritical fluid process development and equipment manufacturing, the business scope mainly includes supercritical extraction equipment, supercritical fluid extraction, supercritical carbon dioxide extraction, small extraction equipment, industrialized supercritical C02 extraction equipment, supercritical carbon dioxide extraction equipment, supercritical CO2 extraction equipment, large carbon dioxide extraction equipment, supercritical extraction, supercritical extraction and so on.
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