Decomposition of Cumene Hydroperoxide Catalyzed by Resins——II.Reaction Process

Since Na+ exists in the water phase rather than the oil phase (cumene hydroperoxide), the separation of oil and water for Na+ removal reaches equilibrium after water washing and standing for 30 min. When the volumetric ratio of oil to water is 5, nearly 100% of Na+ can be removed from cumene hydroperoxide. When the solid catalyst hold-up in a reactor is less than 0.8%, the rate of decomposition reaction increases linearly with the increase of the solid hold-up. However, when the solids hold-up of catalyst is more than 0.8%, the rate of decomposition hardly increases with the increase of the solid hold-up because mass transfer is now the rate-determining step. Similarly, the influence of reaction temperature on the reaction rate is not as remarkable as expected because mass transfer is depressed. In addition, with the increase of water content, the reaction rate decreases, so the water content in raw material must be controlled to a very low level. Based on the reaction conditions, a novel three-phase circulating fluidized-bed (TPCFB) is proposed and used as the reactor for the decomposition of cumene hydroperoxide. The hot model experiments show that the reaction pr℃eeds steadily and cumene hydroperoxide in the product is less than 0.1% which can meet industrial requirement.