Study on synthesis of n -butyl propionate

This article studies the synthesis of n -butyl propionate form propanoic acid and n -butyl alcohol by using the technique of microwave radiation under the catalysising of toluene- p -sulfonic acid,the influence of different parameters such as,the proportion of raw materials,the reaction time ,the usage of catalyst,the usage of water carrying agent,the parameter of microwave power on the rate of esterification were discussed.The results show that catalysts have higher activities,reaction time being short,higher conversion rate of propanoic acid.Optimal conditions were obtained by test:the ratio of n -butyl alcohol and propanoic acid was 1.8∶1.0, the amount of toluene- p -sulfonic acid was 0.3 g, the amount of cyclohexane was 5 mL,and the microwave irradiation time was 10 min with the power of 595 W. The rate of esterification was over 99%.