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Soap removal from soybean oil without water washing
  
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KeyWord:soybean oil  soap removal without water washing  waste clay
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WANG Gaolin  
YANG Fan  
DU Xuanli,etc  
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Abstract:
      The soap removal from soybean oil without water washing was studied. The effects of adsorbent, filter temperature, filter cake thickness and content of soap and phosphorus in degummed and deacidified soybean oil on the content of residual soap and phosphorus in the pure soybean oil were researched. The results showed that the effect of diatomite on soap removal from degummed and deacidified soybean oil was better than waste clay, while the cost of diatomite was higher. When the contents of soap and phosphorus in degummed and deacidified soybean oil were below 260 mg/kg and 14 mg/kg respectively, the effect of waste clay on soap removal without water washing was great. The effects of soap and phosphorus removal at 65℃ were better. Improving the filter cake thickness was beneficial to the removal of soap and phosphorus, while filter cake being too thick would increase the pressure of the filter rapidly, which went against the actual production.
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