alexa Bleaching of alkali-refined vegetable oils with clay minerals
Chemical Engineering

Chemical Engineering

Journal of Analytical & Bioanalytical Techniques

Author(s): Keito Boki, Moriaki Kubo, Tetsuyuki Wada, Takamichi Tamura

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Bleaching efficiencies of bentonites, montmorillonites and sepiolites for alkali-refined rapesseed, soybean, wheatgerm, safflower, corn, cottonseed and sunflower oils were investigated by a batch method at 110°C. The sepiolites with more acid sites at −5.6 < Ho ≥ −3.0 were the most effective in bleaching of each alkali-refined oil. Surface area and acidity at −5.6>Ho ≥ −3.0 were highly significant with bleaching efficiency. The sepiolites (numbers 2 and 3) were more suitable than standard activated clay because they were more effective both in retaining tocopherols and in reducing free fatty acids after bleaching.

This article was published in Journal of the American Oil Chemists Society and referenced in Journal of Analytical & Bioanalytical Techniques

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