Vegetable oil Winterization process is the process of removing waxes from oil by means of crystallization growth of waxes crystals in crystallizes then followed by filtration system to separate winterized oil from wax crystals.
The step of winterizing process is usually the third stage after degumming, neutralization process and bleaching process.
An alternative to winterization process is the cold refining process in which the crude oil in degumming section is treated with low temperature after dosed with phosphoric or citric acid solution then dosed with caustic soda solution.
The oil is then transferred to crystallizes where very low temperature is reached and the mixture is gently agitated to form slurry of gums, soap and waxes.
This mixture is directed to a centrifugal separator where the slurry mixture is separated from oil.
The oil thenproceeds to the washing step.
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