Simulation And Optimization Of The Deoxidizationg In Cyclohexanone Production

The main task of this dissertation aims at the numerical simulation of technologic parameters of deoxidization reactor to produce cyclohexanone by industrial cyclohexane oxidation in chemical plant.Preparation of cyclohexanone in industry consists of two consecutive processes: oxidation of cyclohexane by low content oxygen in air-lift loop reactor to get cyclohexyl hydrogen peroxide and catalytic decomposition of cyclohexyl hydrogen peroxide in the deoxidization reactor to get cyclohexanone. The two reactions are the substantials of the optimization of technologic parameters. Meanwhile, the key to increase output and decrease consumption per unit is the study on air-lift loop reactor and deoxidization reactor. By analyzing the reaction kinetics of cyclohexane oxidation and the dependent reactions, five independent reactions can be confirmed. At the base of above analyses, together withthe mass and enthalpy balance equations and calculational formula of equipment parameter which derived from the simplified series CSTR, a mathematical model of the deoxidization reactor was established. In this dissertation, some proper methods were employed to solve the model equations, such as sequential modular approach.Compared with the actual data of the equipments, the results of the above model were very inspiring. Based on the calculated results, we analyzed the effects of the technologic parameters on the technologic processes and got the following conclusions: the key to increase selectivity and reduce cyclohexane consumption were appropriate decreasing the temperature of deoxidation reactor, augment liquid recycle rate and control the water content of reactants which entering into the deoxidation reactor. The methods in this dissertation can also be applied to other similar industrial production to achieve the optimization of technologic parameters.