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The adsorption behaviour of acid-activated sepiolite (AAS) for the removal of β-carotene (C 40 H 56 ) from rapeseed oil was studied as a function of different sepiolite dosages and bleaching temperatures. The β-carotene level in the oil was reduced from 42.3 to 1.60mg/kg under the optimum conditions of 100°C bleaching temperature and 1.5% sepiolite dosage. A thermodynamic analysis...
The adsorption characteristics of three bleaching clays having different degrees of activation were studied in a palm oil physical refining process. Different clay types and concentrations were used in combination with a fixed amount of synthetic silica. The analytical characteristics of crude, degummed, bleached and steam-refined oils were compared. The isotherms of colour removal vs. clay concentration...
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