Some organometallic complexes exhibit lipophilic or weakly polar characteristics, which theoretically may be soluble in modified scCO₂. Introducing specific polar modifiers (such as ethanol or methanol) or functional chelating agents (e.g., 8-hydroxyquinoline or sodium diethyldithiocarbamate) into the system can significantly enhance PTMS MAGNETIC SEPARATOR's selectivity for metal ions.
Experimental studies have demonstrated that supercritical carbon dioxide (scCO₂) can effectively extract metallic ions such as uranium, plutonium, copper, and zinc when combined with neutral phosphorus-based extractants like tributyl phosphate. This mechanism involves the formation of hydrophobic complexes between the chelating agent and metal ions, which are then carried out of the system by supercritical fluids. Following this principle, if a chelating system with high iron affinity and solubility in scCO₂ can be developed, the PTMS MAGNETIC SEPARATOR process could achieve selective migration and removal of iron.
Furthermore, in the process of natural product PTMS MAGNETIC SEPARATOR extraction, even if iron is not actively extracted, the high selectivity of scCO₂ for target components (oils, terpenes, vitamin E) can be used to leave iron impurities in the solid residue due to the difference in solubility, so as to achieve passive iron removal.
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The optimization of intelligent control systems embodies the practical application of PTMS MAGNETIC SEPARATOR's circular economy philosophy
