After that, the fatty acid composition, bioactive compounds, and the processing technologies of rice bran oil are described and the refining technology of rice bran oil (degumming, deacidification, dewaxing, etc.) as well as the technologies to remaining the bioactive compounds in rice bran oil are introduced.
What is rice bran oil?
Rice bran contains up to 25% of rice bran oil (RBO), depending on the rice variety, milling process, and stabilization system. RBO is produced and consumed in great quantities in Asian countries, such as India, Japan, China, Korea, Taiwan, Thailand, and Indonesia.
How to refine rice bran oil?
In industrial production, rice bran oil is mostly refined by hydration degumming, active clay decolorization, steam deacidification and deodorization, and low-temperature freezing dewaxing. The specific method is to add 2¡ë~3¡ë phosphoric acid and a proper amount of water to treat the crude rice bran oil at 90 °C for degumming.
How is rice bran oil extracted?
There are about 15¨C20% crude oil in rice bran; normally, the rice bran oil is extracted by pressing or solvent extraction methods, such as supercritical carbon dioxide extraction and enzymatic extraction, and then refined by decolorization, deodorization, or other processes.