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One step synthesis of calcium soap by waste cooking oil
  
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KeyWord:waste cooking oil  green synthesis  one step synthesis  calcium soap
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ZHOU Neng, HUANG Jimeng  
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Abstract:
      An environment-friendly direct synthesis method of calcium soap by waste cooking oil and CaO was developed in the presence of catalyst H2O2. Saponification temperature, saponification time, ratio of materials, mass ratio of oil to water and amount of catalyst were optimized by single factor experiment. The results showed that the saponification rate reached above 95% under the conditions of saponification temperature 90-95?℃, saponification time 4.0-6.0 h, amount of catalyst 10 mL(waste cooking oil mass 50 g), mass ratio of waste cooking oil to CaO 50∶?7 and mass ratio of waste cooking oil to water 1∶?4.5. The product was dry granular solid with 7.31% of calcium, 0.12% of free acid,and its melting point was 131-138?℃.
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