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Dynamic supercritical CO 2 extraction for removal of cholesterol from anhydrous milk fat
Author(s) -
Huber W.,
Molero A.,
Pereyra C.,
Martínez de la Ossa E.
Publication year - 1996
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.1996.326-28.x
Subject(s) - anhydrous , chemistry , supercritical fluid , chromatography , extraction (chemistry) , supercritical carbon dioxide , fractionation , solubility , solvent , supercritical fluid extraction , organic chemistry
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°C and 8–40MPa 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.