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Publisher: Altai State University
Journal: Khimiia rastitel'nogo syr'ia (Chemistry of plant raw material)
Languages: Russian
Types: Article
Subjects: vegetable oils, wax compounds, primed mineral additive, kaolin, sodium percarbonate, phosphoric acid solutions, растительные масла, восковые соединения, затравочная минеральная добавка, каолин, перкарбонат натрия, растворы фосфорной кислоты
Studying of waxes crystal formation process in the presence of kaolin is represented an actual problem. The question of working off procedure of activation of the specified mineral additive to increase its sorption ability to waxes is considered. As activating agents the sodium percarbonate and phosphoric acid solutions were used . The activated kaolin was introduced into linen and olive oils, and also an oil of a thistle in quantity of 0,2% in weight at the mass relation to waxes equal 1 : 1. It is revealed, that nucleating of wax crystals in oils can be continued during all period of crystallisation or till 6 hours. Activation of kaolin by sodium percarbonate allows to obtain larger crystals in comparison with its gradual treatment by percarbonate of sodium and phosphoric acid. The obtained result is a consequence of growth of number of the basic electron-donating centres on a surface of kaolin positively effected on the collaterally proceeding sorption of phosphorated substances of vegetable oils. Final treatment of kaolin by phosphoric acid results to increase of unit concentration of crystals in vegetable oils that testifies in favour of increase of number of the primed centres in system as the medium size of crystals drops. It is shown, that the effect of alkaline and acid-basic activation of the mineral additive can be appeared also in ratio of components of a pigment complex of vegetable oils and free aliphatic acids (≈ 20–25% is extracted).
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