Abstract: Due to its high activity，selectivity，easy separation，renewable，and no environmental pollution etc.，zeolites have been widely used in petroleum refining，petrochemical，and fine organic synthesis industrial production.The n-butyl oleate has a wide range of applications as an important of organic chemical product.Therefore，the research on the synthesis of n-butyl oleate by Hβ zeolite catalyst had great significance.The n-butyl oleate was synthesized with oleic acid and n-butanol as raw materials and with sulfuric acid-modified Hβ zeolite as catalyst.Effects of sulfuric acid concentration，treatment time，calcination temperature，and calcination time on the conversion rate of oleic acid were investigated，and the optimal sulfuric acid modification conditions were founded：the acid concentration was 0.1 mol/L，the acid treatment time was 3 h，the acid treatment temperature was 80 ℃，the calcination temperature was 550 ℃，and the calcination time was 5 h.Under those conditions，the oleic acid conversion rate reached 58.8%.

Key words: sulfuric acid modification；H&beta, zeolite；esterification