Effects of physical refining on contents of waxes and fatty alcohols of refined olive oil |
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Authors: | Rana M Tubaileh Antonio Garrido-Fernández M Victoria Ruiz-Méndez Manuel León-Camacho Enrique Graciani-Constante |
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Affiliation: | (1) Instituto de la Grasa, CSIC, Avda. Padre García Tejero, 4, 41012 Sevilla, Spain |
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Abstract: | Changes in the contents of waxes and fatty alcohols during deodorization/physical refining of bleached olive oil were studied.
Experiments were carried out with 1.85% acidity oil, which was physically refined in a discontinuous deodorizer of 250-kg
maximum capacity using nitrogen as stripping gas instead of steam. The variables studied were load and temperature of oil
in the deodorizer as well as N2 flow. Analyses of waxes and alcohols were carried out at different operation times. The maximum content of wax was always
observed when the oil reached the deodorization temperature. The variation in the wax content depended on temperature and
N2 flow. Wax decomposition started and continued during the operating time, and a progressive decrease, which was pronounced
between 3 and 4 h, was observed. Small changes in waxes were observed between 4 and 5 h. Total content of fatty alcohols diminished
throughout the operating time, and changes did not depend on the variables studied. |
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Keywords: | Deodorization fatty alcohols olive oil physical refining waxes |
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