Necessity of winterization in sunflower oil refinery

Oil refinery, Necessity of winterization in sunflower oil refinery

Winterization/dewaxing is one of the methods of crystallization separation. It means the process that the oil is cooled to separate glycerides with higher freezing point in the form of crystallization.

Oil by degumming, after deacidification, bleaching, deodorization, in winterization there will be a small amount of solid fat to be flocculent precipitation, affecting the appearance.

Winterization is the slow stirring of the oil, to control the cooling speed, cooling to about 4 ~ 6 ℃, about 24 hours, which make the solid fat to generate larger crystals precipitate separated. And then filtered to separate oil and solid fats.

Because of sunflower oil in general contain 0.06% a 0.2% wax, if not removed, it can increase oil cloud point, transparency and digestibility decline, gas taste and palatability deteriorates, thereby reducing oil consumption quality and commercial value. The presence of waxy oil not only affects the transparency and taste, and fat in the cooking smoke or produce choking smell, affect human health.

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