PROCESS FOR THE EPOXIDATION OF OLEFINS

摘要

The present invention refers to a continuos process for the epoxidation of olefins with hydrogen peroxide in presence of a heterogeneous catalyst promoting the epoxidation reaction, whereby the aqueous reaction mixture comprises: i) an olefin;ii) hydrogen peroxide;iii) less than 100 wppm of alkali metals, earth alkali metals, both irrespective whether in ionic, complex or covalently bonded form, bases or cations of bases having a pkB of less than 4.5, or combinations thereof; and iv) at least 100 wppm of bases o r cations of bases having a pkB of at least 4.5 or combinations thereof,whereb y the wppm are based on the total weight of hydrogen peroxide in the reaction mixture.