| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for producing propylene oxide, by which cumene is repeatedly used and the activity of a catalyst used in an epoxidation reaction for obtaining propylene oxide from propylene is kept at a high level for a long period of time. <P>SOLUTION: The method for producing propylene oxide, by which the concentration of sodium in a solution containing cumene hydroperoxide supplied to an epoxidation process is≤1,000 wt. ppm, comprises an oxidation process oxidizing cumene into cumene hydroperoxide, an epoxidation process for reacting cumene hydroperoxide obtained by the oxidation process with propylene to give propylene oxide and cumyl alcohol, a dehydration process for dehydrating cumyl alcohol obtained by the epoxidation process in the presence of a solid catalyst to giveα-methylstyrene and a hydrogenation process for hydrogenatingα-methylstyrene into cumene in the presence of a solid catalyst and recycling cumene as a raw material for the oxidation process into the oxidation process. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
