A Study On The Separation Of By-products In The Production Of Dicumyl Peroxide (DCP)

In the production process of dicumyl peroxide(DCP),most of the reactants and products involved in the production process have poor chemical stability.Therefore,a large number of side reaction will happen.The side production includes cumene,cumene hydroperoxide(CHP),?-methylstyrene,acetophenone and ?,?-dimethyl benzenol,they are all important for organic synthesis.The separation methods of them are proposed according to the difference of by-product in properties.The vapor-liquid equilibrium data of cumene-CHP at 5 k Pa and the binary systems of ?-methyl styrene-acetophenone,acetophenone-?,?-dimethyl benzenol,?-methyl styrene-?,?-dimethyl benzenol and ?-methyl styrene-acetophe-?,?-dimethyl benzenol were determined and correlated at atmospheric pressure.Moreover,the experimental data of binary systems were inspected by the method of Herington to judge whether it fits the thermodynamic consistency,and the interaction parameters between binary systems were calculated by regression analysis of thermodynamic data.The data of binary vapor-liquid equilibrium were respected with NRTL and UNIQUAC models by using Aspen plus,and compared with the experiment data,the result mirrors that the relative deviation is less than 5%,it manifests that the experiment data is in line with the calculation results and NRTL model is more suitable for this system.A continuous distillation process was designed to separate cumene and CHP.By drawing the binary phase diagram of cumene and CHP,it can be seen that the relative volatility between the two is much greater than one,which points out that they can be separated by continuous distillation process.The chemical process simulation software was used to investigate the effects of theoretical plate number,feed position,top discharge and reflux ratio on the content and yield of cumene in the continuous distillation process,and the orthogonal experiment was designed to optimize the process parameters.On the basis of these data,an experimental device was established to verify the theoretical value,under the optimized conditions,the content and yield of cumene were 95.23% and 96.88%.Continuous distillation and extractive distillation were used to separate the byproducts in the dehydration condensation stage in production of DCP.According to the basic principles and methods in selecting extractant,single-stage extraction simulation and phase equilibrium determination were used to select the extraction solvents in extractive distillation process,and the effects of process parameters on continuous distillation,extractive distillation and solvent recovery were investigated.Through optimizing the process parameters,we can figure out that the best conditions of the three tower.According to the above conditions,an experimental device was established to verify the theoretical value,the results show that the relative error between the simulation value and the experimental value is less than 5%,which indicates that the experimental value is consistent with the calculated value and proves the feasibility of the process flow.