The Pr p-hydroxybenzoate was synthesized from p-hydroxybenzoic acid and n-propanol using expandable graphite as the catalyst under the circumfluent dehydration conditions.Exptl. results indicated that the optimum conditions were as follows:molar ratio of alc. to acid was 3:1, the mass of catalyst is 5% of total reaction material, and reflux reaction time was 3h.The yield of Pr p-hydroxybenzoate reached 94.5%.When the catalyst was used for 6 times without any treatment, the yield of esterification product could get 90.0%.This reaction has advantages of high yield, short reaction time and easy operation.