METHOD OF PRODUCING ALKYLENE OXIDE BY OLEFIN EPOXIDATION Russian patent published in 2015 - IPC C07D301/12 C07D303/04 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing alkylene oxide by olefin epoxidation. The disclosed method comprises the following steps: (1) in a first olefin epoxidation condition, in the presence of a first solid catalyst, a first mixed stream containing a solvent, an olefin and H₂O₂ is subjected to epoxidation in one or more fixed bed reactors and/or one or more moving bed reactors until the conversion of H₂O₂ reaches 50%-95%, then, optionally, the reaction mixture obtained at step (1) is subjected to separation to obtain a first stream free of H₂O₂ and a second stream containing unreacted H₂O₂, and the olefin is fed into the second stream to produce a second mixed stream, or optionally, the olefin is fed into the reaction mixture obtained at step (1) to produce a second mixed stream; (2) in a second olefin epoxidation condition, the reaction mixture obtained at step (1) or the second mixed stream obtained at step (1) and a second solid catalyst are fed into one or more slurry bed reactors to conduct epoxidation until the total conversion of H₂O₂ reaches 98% or more, under the condition that said method of producing alkylene oxide by olefin epoxidation has selectivity for the alkylene oxide of 90% or more.

EFFECT: combining the slurry bed reactor with the fixed bed reactor and/or the moving bed reactor enables to overcome the disadvantage of low conversion of H₂O₂ when only the fixed bed reactor and/or the moving bed reactor is used, and the low selectivity for the target alkylene oxide when only the slurry bed reactor is used.

10 cl, 2 tbl, 8 ex