Yes, it is possible to extract oil from rice bran. The process begins with raw material preparation. Rice bran is first screened and then heated by steam at a temperature higher than 100 degrees Celsius to stop Lipase hydrolysis in rice bran prior to extraction.
Conventional extraction methods employ hexane as the solvent, but these methods suffer from some drawbacks linked to the toxicity of hexane for humans and the environment. Therefore, new green technologies are being applied for the extraction of rice bran oil (RBO), providing reliable alternatives to conventional solvent extraction methods.
For large scale production, specifically for input capacity above 20 tons per day, the pretreatment then solvent extraction method is adopted, which includes cleaning, puffing, cooking and drying processes, then using N-hexane to extract oil from rice bran. The final oil residue is lower than 1%.
Rice bran oil (RBO) is a high value-added product with unique health properties as a result of its high concentration in γ-oryzanol, a powerful antioxidant mixture of bioactive molecules. It’s mainly produced and consumed in Asian countries, where it is considered as a “healthy oil” thanks to its extraordinary properties.