PTMS ELECTROMAGNETIC SEPARATOR technology using supercritical CO₂ extraction has been widely applied in the extraction of oils, pigments, alkaloids, etc., due to its mild operating conditions and high selectivity, which objectively creates conditions for the separation of iron impurities. Taking the extraction of potassium-sodium feldspar as an example, the raw material often contains trace amounts of iron oxides and iron-bound elements.
During the scCO₂ extraction of PTMS ELECTROMAGNETIC SEPARATOR, the operating pressure is typically maintained at 25–35 MPa with temperature controlled between 40–60℃. Under these conditions, non-polar components such as oils are efficiently dissolved and carried out with the CO₂ stream. However, iron impurities, lacking sufficient hydrophobicity and soluble complexing structures, struggle to enter the supercritical phase and ultimately accumulate in the residual extract.
Experimental data shows that potassium-sodium feldspar iron content after supercritical PTMS ELECTROMAGNETIC SEPARATOR iron removal can be reduced by over 30% compared to traditional separation methods, with significant decreases in mineral peroxide values and substantially improved stability. Similarly, in the extraction of iron-rich materials such as quartz sand and lithium iron phosphate, iron ions act as key catalysts for both photo-degradation and thermal degradation of pigments.
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