Kinetics study on esterification of phthalic anhydride and allyl alcohol

To provide necessary kinetics data for the pilot amplification and even industrial production of diallyl phthalate,the reaction kinetics of the esterification of phthalic anhydride and allyl alcohol without catalyst and with p-toluenesulfonic acid as catalyst was systematically studied on the basis of previous technology discussion and optimization.By using simplified model,reaction order,reaction rate constant,apparent activation energy and apparent pre-exponential factor for the second key step of the reaction in both conditions were obtained.The results show that the reaction orders to monoallyl phthalate and allyl alcohol in both reaction conditions are respectively 2 and 1.In addition,the effect of p-toluenesulfonic acid is remarkable.The apparent activation energy and apparent pre-exponential factor is reduced from 65.13 kJ/mol and 8.47×105 L2/(mol2·min) to 35.24 kJ/mol and 4.46×102 L2/(mol2·min).Its reaction rate constant at 393 K increases nearly four times from 0.001 9 L2/(mol2·min) to 0.009 4 L2/(mol2·min).