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　　 Dewaxing is an important process in oil refining equipment, which is often performed after degumming, deacidification, decolorization, and deodorization. It is an indispensable process for fats and oils to reach the first-class standards for edible oils. The dewaxing process is based on the difference between the melting point of wax and grease and the characteristic that the solubility of wax in grease decreases with the decrease of temperature. The temperature is reduced to promote the precipitation of wax crystals to form a suspension (commonly known as winterization), which is then separated by mechanical separation. Separated from grease.

　　The effect of dewaxing process on oil:

　　 High-quality edible oil, its quality requirements are very high, no matter in terms of appearance, smell, palatability, eating quality and nutritional value, its quality standards are strict. However, if the grease contains a small amount of wax, its transparency will be reduced when the temperature is not high, and because it is a suspension in the oil, it will have a certain effect on the color, even in the north. There is also wax in the oil, which will reduce the digestion and absorption rate, and make the taste and palatability of the gas worse, thereby reducing the edible quality and nutritional value of the oil.

　　 On the other hand, wax is an important industrial raw material and can be used in various industries such as wax paper, waterproofing agent, and glossing agent. Therefore, removing or extracting wax from oil can achieve the purpose of improving the quality of edible oils and comprehensive utilization of raw materials, and improving economic benefits.