Kinetic study of unsaturated ketones epoxidation with hydrogen peroxide through the inverse phase transfer catalysis and effect of ultrasonic waves in this epoxidation

Kinetic study of epoxidation of unsaturated ketone of mesityl oxide was studied by using Hydrogen peroxide in the presence of dodecyltrimethyl ammonium bromide (DTAB) as an inverse phase transfer catalyst. The reaction was carried out in the two-phase media of waterheptane with 1:1 ratio in 25 °C. It was found that the order of reaction for mesityl oxide for ketone concentration in the range of 0.03- 0.1 mol L-1 are 0.8906. an‎d also with regard to catalyst concentrations in the range of 0.07- 0.2 mol L-1, the order of reaction for catalyst is 0.1205. The order of reaction of Hydrogen peroxide in the range o of 1.5-4 mol L-1 concentration for mesityl oxide is –0.1411. The activation energy of the reaction is 27.51 kJ mol-1 in the restricted temperature between 10-25 °C and it was observed that reaction rate enhances by temperature increase. As the phase transfer catalyst depends strongly on mass transfer between two phases, it is well understood that ultrasonic waves have a greater efficiency of interface mixing than conventional agitation. So, in this research the effect of ultrasonic waves in comparison with magnetic stirrer was studied. The results showed that an ultrasonic wave accelerates on the reaction.