Study on Epoxidation of Maleic Acid by Heteropoly Acid (Salt) Catalysts

The paper is about the catalyst performance of heteopoly acid(salt)for eporidation of maleic acid in the presence of hydrogen peroxide.The experimental results show that under the condition of pH=6,reaction temperature 65 ℃,Catalyst 0.5 %,Maleic acid ∶ H2O2= 1∶1,the higher yield were received.