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Preparation of epoxidized fatty acid methyl ester of styrax tonkinensis seed oil without carboxylic acid
  
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KeyWord:styrax tonkinensis seed oil  epoxidation  epoxidized styrax tonkinensis seed oil fatty acid methyl ester  phase transformation catalyst
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Author NameAffiliation
CHEN Jie  
NIE Xiaoan  
LIU Zhenxing  
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Abstract:
      The self-made heteropolyphosphatotungstate was used as phase transformation catalyst in the epoxidation reaction of styrax tonkinensis seed oil. The epoxidation reaction was an efficient and environment friendly process without traditionally used carboxylic acid as catalyst. The reaction conditions were optimized by orthogonal experiment as follows: fatty acid methyl ester of styrax tonkinensis seed oil 10 g, molar ratio of cetylpyridinium chloride monohydrate to phosphoric acid to tung stic acid of heteropoly- phosphatotungstate 2∶1∶4, hydrogen peroxide dosage 5.67 g, dropping rate of hydrogen peroxide 150 mL/h，reaction time 0.5 h and ethyl acetate dosage 20 mL. Under these conditions, the epoxy value of epoxidized styrax tonkinensis seed oil fatty acid methyl ester could reach 4.67%. The process had the items of short reaction time and no organic acid waste water pollution.
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