Abstract
A new process was developed to oxidize 1-naphthylamine by H2O2 in acetic acid for preparing 1,4-naphthoquinone.The effects of the reaction temperature,the oxidation time,molar ratio of 1-naphthylamine to H2O2,the concentration of sulfuric acid and the concentration of H2O2 on the product yield were investigated.The optimal reaction conditions for preparing 1,4-naphthoquinone with yield higher than 52.2% are as followings:the molar ratio of 1-naphthylamine to H2O2 is 1∶ 10,the mass concentration of H2O2 is 5%,the mass concentration of sulfuric acid is 45%,reaction temperature is 80 ℃,and reaction time is 3 h.This method has the advantages such as simplicity,easy separation of the product and short reaction time.
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