Simulation and optimization of methyl acetate catalytichydrolysis with 001×7(732) cation-exchange resin
The hydrolytic kinetics experiments for methyl acetate with 001×7(732) cation-exchange resin were carried out in a batch fully-stirred reactor in the ranges of 40—55℃ of reaction temperature, 100—600 g·L-1 of catalyst concentration and 0.5∶1—9.0∶1 of molar ratio of water to MeOAc, while the effect of resin particle size was neglected.Based on some experimental phenomena and absorption characteristics of some components on catalytic sites in the process of hydrolysis reaction, one pseudo-homogeneous and two heterogeneous hydrolytic kinetic models were established, and the parameters were estimated based on experimental data.An optimal heterogeneous hydrolytic kinetic model, which showed good agreement with the experimental data, was obtained.The optimal model was based on the proposed mechanism that both methyl acetate and water were absorbed on catalytic sites and the surface reaction was the rate-controlling step.Some operational parameters of methyl acetate catalytic hydrolysis with 001×7(732) cation-exchange resin were optimized through the simulation calculations based on this model.The obtained optimal values were as follows: 55℃ of reaction temperature, 260 g·L-1 of catalyst concentration and 1.5∶1 of molar ratio of water to MeOAc.Under the conditions of the optimized operation parameters, the hydrolytic conversion of methyl acetate reached 34.8% close to the equilibrium hydrolytic conversion after 90 min of the hydrolysis reaction.