Study on the Synthesis of Butyl p-Hydroxybenzoate

Butyl p-hydroxybenzoate were synthesized by reaction of p-hydroxybenzoic acid and butanol,with aminosulfonic acid as catalyst.The optimum conditions are as follows: the ratio of butanol,p-hydroxybenzoic acid,aminosulfonic acid is 0.30 mol︰0.05 mol︰2 g,using dehydration equipment refluxing for 6 h,The yield can be reached 89.7%,The conversion rate can be successfully analyzed with the method of Acid-Base Titrimetry;The activity of some kinds of sulfonic acid catalysts have been studied.These products were charatorized by measuring its melting point,IR.