Measurement Of Basal Data And Process Optimization Of Cyclohexanol Produced By Catalytic Distillation

Cyclohexanol is a kind of organic chemical intermediate product widely used in chemical production process.The direct hydration of cyclohexene to product cyclohexanol has been applied to industrial production.For the mutual solubility between cyclohexene and water is low,the reaction is limited by chemical equilibrium,and there is a disadvantage that the conversion rate of cyclohexene is low.Therefore,this paper utilizes a catalytic distillation technique in which a cosolvent isophorone is added to the system to overcome this problem.The main research contents are as follows:(1)The ternary system cyclohexene + cyclohexanol + isophorone and the quaternary system cyclohexene + water + cyclohexanol + isophorone were determined using a BCF-1 vapor-liquid equilibrium reactor.Vapor-liquid equilibrium data for the mixture at 500 kPa.Using NRTL,Wilson and UNIQUAC activity coefficient models associated with water-cyclohexene,water-cyclohexanol,water-isophorone,cyclohexene-cyclohexanol,cyclohexene-isophorone and cyclohexanol-isophorone gives a binary interaction parameter.(2)The kinetics of cyclohexene hydration reaction was studied in a batch reactor with stirring.The effects of different operating conditions on the hydration reaction of cyclohexene were investigated.The experimental data were fitted by a pseudo-homogeneous kinetic model to obtain the reaction kinetic equation.(3)Using the chemical calculation software Aspen Plus,based on the equilibrium model,using the obtained thermodynamic data and kinetic equations,the simulation process of cyclohexene catalytic distillation process with cosolvent was established.A stainless steel catalytic distillation column with an inner diameter of 32 mm was used to measure the temperature distribution and product concentration distribution in the column,and the established model was verified and verified.Finally,the effects of various process parameters on the conversion of cyclohexene and product purity in the catalytic distillation column were investigated by simulation to determine the optimum process conditions for catalytic distillation to synthesize cyclohexanol.