ABSTRACT
Interest in cumene began during the second World War when it was used in high-octane aviation gasoline. The major process used is UOP’s vapour-phase cumene hydroperoxide route based on propylene and benzene. Cumene is recovered from the liquid product by distillation. In the exothermic reaction, enough heat is released during the formation of cumene to vaporize three times its weight of benzene. Cumene has essentially only one outlet–the manufacture of phenol, with acetone as a valuable by-product. Very small amounts of cumene are used for alpha methyl styrene which can be recovered from the process. Cumene vapour is irritating to eyes and nose, while excessive exposure can lead to headaches and narcosis. Cumene is stable at room temperature but must be kept well away from oxidizing agents. Cumene must not be allowed to get into sewers or watercourses. Clean-up staff must wear full protective clothing. Cumene is a fire and explosion hazard when heated.
