Dewaxing is an essential part to improve the quality of cooking oil, which is closely related to degumming, deacidification, bleaching and deodorization process. The presence of wax mainly affect the palatability of oil, so the main purpose of dewaxing is to improve the palatability of oil; increase the oil sensory such as transparency, smoke point; improve the body’s digestion and absorption of oil and beneficial to the comprehensive utilization of wax. In short, oil dewaxing adopts forced cooling to make the high melting point wax & solid oil precipitate out from liquid oil and then use the method of filtration or centrifugal separation to remove them. Different oils have different wax content. It is almost necessary to dewax the following products (such as corn oil, rice bran oil, sunflower oil, cottonseed oil, etc.).
Oil fractionation is by using the differences of glycerol’s melting point and solubility contained in various oil to divide the oil into solid fats and liquid oils.
In theory, oil dewaxing (winterization) and oil fractionation seem to be different, but in fact, their process principle, process technology and the processing equipment they used are the same.

refined(dewaxed,fractionated) oil products

Oil Dewaxing and Fractionation Distinction

  • Oil dewaxing and fractionation are based on the same principle, but they have different purposes. Dewaxing is by removing wax content to improve the palatability and quality of the oil. While fractionation is by using the differences of glycerol’s melting point and solubility to obtain solid fats & liquid oils from raw material.
  • During oil dewaxing winterization, oil is kept at low temperature for a period of time and then filtered to remove solid impurities that can cause liquid oil become cloudy.
  • Oil fractionation is a modified process, which involves a larger change in the material components, and improve the physical properties of the oil product. For example, fractionated coconut oil contains a large amount of medium-chain fatty acids like caprylic acid (C8) and capric acid (C10) that may lead to modest weight loss and provide several other health benefits.
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