Rice bran oil, also known as rice oil, is an emerging healthy oil in recent years. The advantage of rice oil is that it is both nutritious and functional. Rice oil has a balanced fatty acid composition and is rich in beneficial lipid accompaniments such as oryzanol and phytosterols. In addition, rice oil has a high smoke point and high temperature resistance, making it suitable for frying foods, as well as making margarine and shortening. Rice bran is the main byproduct obtained in the process of processing rice into rice. The production process of rice bran oil mainly includes two key steps: extraction and refining. The following is a detailed introduction:
Rice bran oil extraction process:
- Pretreatment: Rice bran first needs to be pretreated, including removing impurities, conditioning and puffing. During the conditioning process, the rice bran will be heated and humidified so that a porous structure is formed during puffing, which is conducive to the extraction of oil.
- Extraction: The pretreated rice bran enters the extractor and is extracted using a solvent (such as n-hexane). The oil is dissolved in the solvent to form a mixed oil. Then, by evaporation and stripping, the solvent is removed to obtain crude rice bran oil.
Rice bran oil refining process:
- Degumming: Add hot water to the crude rice bran oil to condense and precipitate water-soluble impurities, then separate.
- Deacidification: Remove free fatty acids from the oil by heating and steaming.
- Decolorization: Remove pigments from the oil using adsorbents (such as white clay).
- Deodorization: Remove odorous substances from the oil by steam distillation.
- Dewaxing: Cool the oil to crystallize the wax, then remove the wax by filtering.
These steps ensure the purity and stability of the rice bran oil, making it suitable for consumption and storage. If you have more specific questions or need further details, please contact us!
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