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Dynamic supercritical CO2 extraction for removal of cholesterol from anhydrous milk fat
- Huber, W., Molero, A., Pereyra, C., Martinez de la Ossa, E.
- International journal of food science & technology 1996 v.31 no.2 pp. 143-151
- milk fat, carbon dioxide, extraction, cholesterol, temperature, flow, adsorption, silica gel, solubility
- The feasibility of different extraction techniques for the selective removal of cholesterol from anhydrous milk fat (AMF) by supercritical carbon dioxide has been studied. A dynamic extraction system was used to determine both the experimental solubility of anhydrous milk fat in the supercritical solvent and the selectivity of cholesterol over anhydrous milk fat at 40-70 degrees C and 8-40 MPa at various stages during extraction. In addition, adsorbents were used for the selective removal of cholesterol from anhydrous milk fat. The results indicate that a direct extraction alone or with several separators in series are not practical, but a selective removal of 97% of the cholesterol from the extracted anhydrous milk fat is possible by using an adsorbent with recovery of solvent and cholesterol. A schematic industrial countercurrent process for the removal of cholesterol and the fractionation of milk fat is proposed.