Abstract
Two mixtures of refined sunflower seed oil, one with oleic acid and the other with olive oil distillates from a laboratory plant, were physically refined using nitrogen as stripping gas in a discontinuous deodorization pilot-plant scale installation (30-L capacity). Two heating procedures were tested: one using independent electrical heating for the oil and the gas distillates so as to maintain the same temperature in both, and another in which only the oil was heated and controlled, resulting in a difference in temperatures in the oil and the gas distillates. Two different oil temperature values and three nitrogen flow rates were also assayed. The statistical technique of blocking with paired comparisons was used to analyze the results. These results showed that maintaining the same temperature in the oil and gas distillates had a positive effect on free fatty acid distillation rate and vaporization efficiency. Oil temperature and nitrogen flow rate also influenced some of the aforementioned responses.
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Prieto González, M.M., Bada, J.C., Graciani, E. et al. A comparative study of two heating procedures in the physical refining of edible oils. J Amer Oil Chem Soc 76, 1471–1476 (1999). https://doi.org/10.1007/s11746-999-0187-z
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DOI: https://doi.org/10.1007/s11746-999-0187-z