| 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 or cations of bases having a pkB of at least 4.5 or combinations thereof,whereby the wppm are based on the total weight of hydrogen peroxide in the reaction mixture.
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