Study on the new technology of synthesis of dimethyl fumarate

Using furfural as the raw material with KClO_3 as the oxidant the V_2O_5 as the catalyst to prepare fumaric acid. Synthesis of dimethyl fumarate by esterification reaction of fumaric acid with methanol catalyzed by heterogeneous supported heteropoly acid PW_(12)/C. The influences of catalyst amount, oxidant amount,reaction time and molar ratio of methanol to acid were investigated, and the optimum condition were as follows:mass ratio of KClO_3 to furfural was 1.8∶1,usage of catalyst was (0.2 g),reacted 4 h at 105 ℃,the yield of fumaric acid was 80.7%;molar ratio of methanol to acid was 7∶1,mass ratio of catalyst to fumaric acid was 6∶100,reaction time was 6 h, the yield of dimethyl fumarate can reached 88.1%.