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Degumming and bleaching with acid-modified attapulgite of rice bran oil
  
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KeyWord:rice bran oil  acid-modified attapulgite  degumming  bleaching
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CHEN Xuefang，WANG Can，ZHANG Hairong，GUO Haijun，CHEN Xinde  
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Abstract:
      The degumming process of crude rice bran oil was studied by orthogonal experiment.And the optimal acid degumming conditions were obtained as follows：dosage of phosphoric acid 0.3%，degumming temperature 70?℃，dosage of water 3% and reaction time 40 min.Under these conditions，the degumming rate of rice bran oil was 87.7%.Then the effects of dosage of attapulgite，bleaching temperature and bleaching time on the bleaching rate of rice bran oil were studied by single factor experiment. The results showed that under the conditions of dosage of attapulgite 5%，bleaching temperature 110?℃ and bleaching time 30 min, the bleaching rate of rice bran oil reached 96.6%.
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