4. Applications
With the recent resurgence of interest in liquefied gas extraction, industrial applications are still confidential. However, since the end of the 2000s, more than a hundred studies have been carried out, resulting in a more abundant bibliography.
Since 1950, publications on the use of liquefied gases as an extraction solvent have described processes using mainly :
liquefied petroleum gases (propane, n-butane and LPG), chemically similar to hexane;
dimethyl ether, miscible with water and capable of extracting a wide range of compounds;
tetrafluoroethane, which is non-flammable and more selective.
Given the characteristics of each solvent, studies focus on the extraction of lipophilic molecules, in particular the extraction...
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