Synthesis of Ethyl Salicylate with Active Carbon Supported p-Toluene Sulphonic Acid as Catalyst

Ethyl salicylate was synthesized with salicylic acid and alcohol as materials and p-toluenesulfonic acid supported by activated carbon as catalyst.The effect of reaction time,molar ratios of alcohol to salicylic acid,and catalyst dosage were investigated.The optimum conditions were obtained as followed:under the reflux temperature 90～95℃,reaction time 4h,the mole ratios of alcohol to salicylic acid was 4:1,the dosage of catalyst was 8%of the total mass of the reactant efficiency.The yield of ethyl salicylate was 34.9%,and the catalyst could be repeatedly used.