N-butyl p-hydroxybenzoate of Sodium Bisulfate and a Inorganic Solid Acid Catalyst Erterification

N-butyl p-hydroxybenzoate was synthesized with high yield by esterification of n-butyl alcohol with phydroxybenzoic acid in the presence of sodium bisulfate monohydrate and A.The effects of amount of sodium bisulfate monohydrate and A,amount of n-butyl alcohol,amount of water-carring agent and reaction time on the yield of n-butiyl p-hydroxybenzoate were investigated.Ester field of 92.0% was obtained under the following condition: molar ratio of p-hydroxybenzoic acid,n-butyl alcohol and sodium bisulface 1:2:0.072,in the presence of the amount of A was 0.1 g and the amount of water-carring agent was 5 mL,refux for separating water for 4 h.