Process for producing propylene oxide

摘要

A process for producing propylene oxide comprising reacting propene with hydrogen peroxide in the presence of a catalyst to give a mixture (G1) comprising propylene oxide, unreacted propene, and oxygen; separating propylene oxide from mixture (G1) to give a mixture (GII) comprising propene and oxygen; and adding hydrogen to mixture (GII) and reducing the oxygen comprised in mixture (GII) at least partially by reaction with hydrogen in the presence of a catalyst comprising copper in elemental and/or oxidic form on a support, wherein copper is present on the support in an amount of 30 to 80 wt.-% based on the whole catalyst and calculated as CuO.

主权项

1. A process for producing propylene oxide, comprising
(I) reacting propene with hydrogen peroxide in the presence of a zeolite as a first catalyst to obtain a mixture GI comprising propylene oxide, unreacted propene, and oxygen; (II) separating propylene oxide from the mixture GI to obtain a mixture GII comprising propene and oxygen; (III) adding hydrogen to the mixture GII and reducing the oxygen of mixture GII at least partially by reaction with hydrogen in the presence of a second catalyst comprising copper in elemental form, oxidic form, or both forms, on a support, wherein the copper is present on the support in an amount of 30 to 80 wt. % based on a total catalyst weight and calculated as CuO, to obtain a mixture GIII.