Characteristics of rice bran oil
Rice bran oil contains more unsaturated fatty acids, natural phenols, and sterols. The sterols in rice bran oil are campesterol, stigmasterol, and ß-sitosterol, which are the precursors of chemically synthesized sterol hormones. These sterol hormones include androgens, estrogens, contraceptives, diuretics, anticancer agents, anabolic agents, and the like. Read More: Soybean Oil Wiki
Process flow of supercritical CO2 extraction of rice bran oil
The technological process of using supercritical CO2 fluid to extract rice bran oil is rice bran pretreatment→supercritical CO2 fluid extraction→separation→rice sickle oil.
CO2 Extraction Process Parameters of Rice Bran Oil
- Extraction pressure 29.6Mpa
- Extraction temperature 35°C
- Extraction time 5h,
- The yield of rice bran oil is 17.98%
- Wherein the total amount of sterols is 7.25 mg/g.
If an entrainer is used and 5% ethanol(Co-solvent) is mixed into CO2 before entering the extractor, the yield of rice bran oil can be increased to 18.23%, and the total content of sterols can be increased to 8.30mg/g. In addition, multi-stage separation can be considered to achieve the enrichment of sterols.