Winterization is a narrow process, it same as that of dewaxing. This process is applied to remove small quantities of solids from oil that would normally cause cloudiness of the oil when keep at refrigeration temp, these substances can be saturated glycerides or waxes. Waxes are esters of fatty alcohol and fatty acid, which have a very low solubility in oil. There quantity is different in different oils. Generally varies in between 48-2000 ppm. In order to obtain oil with good cold stability, the waxes contain needs to reduce to the level of about 10 ppm. In this process cooling rate & agitation are carefully controlled to promote the formation of nuclei that will serve as the sites for crystal growth.
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