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Application of nanofiltration in concentration of soy isoflavones eluent
  
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KeyWord:nanofiltration membrane  soy isoflavones  concentration
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CHEN Xuebing  
WU Lirong  
ZHOU Xuejin，etc  
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Abstract:
      The application of nanofiltration in concentration of soy isoflavones eluent to remove ethanol was studied.The optimal operation conditions were obtained as follows: the retent relative molecular weight of nanofiltration membrane 150 Da, operation temperature 35 ℃, operation pressure 2.5 MPa. Under these conditions, the solid content of feed concentrated from 1.82% to 11%, the concentration ratio reached 6.04, and 85% of ethanol was separated from soy isoflavones eluent. Furthermore, the nanofiltration membrane could be used repeatedly by ethanol washing.
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