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Bleaching of alkali‐refined vegetable oils with clay minerals
Author(s) -
Boki Keito,
Kubo Moriaki,
Wada Tetsuyuki,
Tamura Takamichi
Publication year - 1992
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02635892
Subject(s) - cottonseed oil , alkali metal , chemistry , clay minerals , sunflower , cottonseed , sunflower oil , safflower oil , nuclear chemistry , mineralogy , food science , organic chemistry , agronomy , biology
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 < H o ≥ −3.0 were the most effective in bleaching of each alkali‐refined oil. Surface area and acidity at −5.6>H o ≥ −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.