Journal of the American Oil Chemists Society · 1994 · 26 citations · 13 references
Food ChemistryAgricultural ChemistryChemical EngineeringEngineeringExperimental Adsorption IsothermsSoybean OilBiochemical EngineeringGreen ChemistryAlkali‐refined RapeseedFood ProcessingSynthetic AdsorbentsAdsorptionBio-based SorbentSeed ProcessingHealth Sciences
Abstract Efficiencies of synthetic adsorbents and attapulgites in bleaching alkali‐refined rapeseed and soybean oils ranged from 13–53% and 93–97%, respectively. The Freundlich equation was more applicable than the Langmuir equation to the experimental adsorption isotherms of β‐carotene on attapulgites. Bleaching with attapulgites reduced tocopherols by 12.5–29.5% in rapeseed oil and by 18.9–44.8% in soybean oil. Cosmetic‐grade attapulgite was superior to the others in bleaching efficiency, equilibrium amount adsorbed and removal of free fatty acids.
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