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Acid degumming process of rice bran oil and its effect on loss of γ-oryzanol and β-sitosterol
  
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KeyWord:rice bran oil  degumming  phosphoric acid  γ-oryzanol  β-sitosterol
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LI Junjie，LI Ke， MO Yuhua， LI Luoming  
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Abstract:
      The acid degumming technology was used in crude rice bran oil degumming ,and the effects of dosages of phosphoric acid, dosage of water,degumming temperature and degumming time on the degumming rate and loss rates of γ-oryzanol and β-sitosterol were studied.The results showed that under the conditions of dosages of phosphoric acid 0.15%, dosage of water 5.0%,degumming temperature 65?℃ and degumming time 40 min, the degumming rate of crude rice bran oil was the highest,reaching 91.13%, while the loss rates of γ-oryzanol and β-sitosterol were relatively lower, reaching 12.22% and 5.99%, respectively.The content of phosphorus in degummed oil was 22.07 mg/kg, and the content of saturated fatty acid increased by 1.6 percentage points, while the content of unsaturated fatty acid decreased by 1.6 percentage points, and the ratio of oleic acid to linoleic acid was about 1.09∶?1 with a slight change.
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