PROCESS FOR PREPARATION OF PROPYLENE OXIDE

摘要

A process for the preparation of propylene oxide which comprises the following steps, wherein alcohols having two or three carbon atoms, cyclohexanol and/or isopropylcyclohexane formed as by−products are removed from the system at one or more stages either during the steps or between the steps: oxidation step of preparing cumene hydroperoxide by oxidizing cumene, epoxidation step of reacting the cumene hydroperoxide obtained in the oxidation step with propylene to form propylene oxide and cumyl alcohol, and hydrogenolysis step of preparing cumene by hydrogenolysis of the cumyl alcohol obtained in the epoxidation step and recycling the cumene to the oxidation step as the material.