Study on Synthesis of Dibutyl Maleate with Solid Superacid Catalyst

The optimum technological conditions were studied on the synthesis of Dibutyl maleate by the reaction of maleic acid and n-butanol with SO_4~2-/ Fe_2O_3-TiO_2 as catalyst.The results showed that the yield was over 96% when molar ratio of n-butanol and maleic acid was 4.0:1,reaction time of reflux was 3.0h mass of catalyst was 5% of maleic acid.This process has many advantages such as higher yield,simple procedure,shorter reaction time,non-corrosive,non-pollution,etc.