PRODUCTION OF PROPYLENE OXIDE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing propylene oxide by using ethylbenzene and propylene as a raw material by which the degradation deterioration of ethylbenzene hydroperoxide by an organic acid is retarded when carrying out alkali washing. SOLUTION: This method for producing propylene oxide comprises the following liquid phase oxidation step, alkali washing step and epoxidation step: the liquid phase oxidation step for carrying out the liquid phase oxidation of ethylbenzene in the presence of an alkali metal compound or an alkaline earth metal compound to provide ethylbenzene hydroperoxide; the alkali washing step for carrying out alkali washing of the reaction liquid obtained by the liquid phase oxidation step; the epoxidation step for subjecting the ethylbenzene hydroperoxide after the alkali washing in the reaction liquid to epoxidation reaction with propylene to provide the objective propylene oxide.