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Supercritical CO2 Extraction of Rice Bran Oil

Characteristics of rice bran oil

Supercritical CO2 Extraction 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.

Read More: CO2 Extraction Process: Basics, 5 Advantages, 7 Features, 4 Applications

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.

About Co-solvent

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.

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