Sunflower oil refining process Sunflower oil extracted after physical pressing is generally called sunflower oil, which contains some impurities, including peptizing impurities, free fatty acids, pigments, odors, waxes, etc.
Product Description
Sunflower oil refining process
The sunflower oil extracted after physical pressing is generally called sunflower crude oil, which contains some impurities, including peptizing impurities, free fatty acids, pigments, odors, waxes, etc.Crude sunflower oil needs to be refined to obtain high-quality sunflower oil that meets national standards. So how to refine sunflower oil? What is the refining process of sunflower oil?
The refining process of sunflower oil mainly includes five parts: degumming, deacidification, decolorization, deodorization and dewaxing
1. Degumming
The function of degumming is to remove peptizing impurities from the sunflower crude oil. Peptizing impurities can affect the stability of sunflower oil and the subsequent effects of refining. Hydration degumming is generally used to remove peptized impurities. The specific operation process is to add hot water to the sunflower oil to make the peptized impurities agglomerate into clusters, and then remove the impurities after sedimentation and separation.
2. Deacidification
Deacidification works by removing free fatty acids from hairy sunflower oil.
There are generally two ways to remove free fatty acids: chemical deacidification and physical deacidification.The operation process of chemical deacidification is to add lye to the sunflower oil to neutralize it with free fatty acids, thereby removing free fatty acids. After chemical deacidification, a by-product soapstock is produced, which is also the raw material for processing soap.
The operation process of physical deacidification is to pass water vapor into the sunflower oil, and use the principle of distillation to remove free fatty acids. The by-products obtained after physical deacidification are fatty acids, which can be further processed to obtain additional profits.
3. Decolorization
The function of decolorization is to remove the pigment in the sunflower oil, so that the color of the sunflower oil meets the national standard. The specific operation process of decolorization is to add white clay to the sunflower oil, and use the adsorption of white clay to remove the pigment in the oil. After decolorization, the waste clay in the oil needs to be filtered out with a leaf filter.
4. Deodorization
The function of deodorization is to remove the odor in sunflower oil. The presence of odor can affect the edible value of sunflower oil. The specific operation process of deodorization is to introduce water vapor into the sunflower oil, and use the difference in volatility of oil and odorous substances to remove odorous substances. After deodorization, the smoke point, flavor and stability of sunflower oil will be changed.
5. Dewaxing
Dewaxing works by removing wax from sunflower oil, which improves the quality of sunflower oil. Dewaxing is the removal of waxes from sunflower oil by crystallization filtration. Dewaxed sunflower oil is of high quality and has a high market value.
