| 摘要 |
The invention relates to an economic single-stage process for producing epoxides by oxidation of olefins in a homogeneous gas-phase reaction by reacting the olefin in a flow reactor with a gas mixture of ozone and NOand/or NO as oxidant without using a catalyst, wherein ozone and NOand/or NO are mixed in a mixing chamber which is provided upstream of the flow reactor, which is characterized in that the olefin is reacted with the gas mixture of the oxidant in the reaction zone of the flow reactor at a reaction temperature of about 150 to about 450°C and at a pressure of 250 mbar to 10 bar, wherein the olefin-containing carrier gas stream is heated in a preheating zone of the flow reactor to a temperature of 250 to 650°C, the gas mixture of the oxidant from the mixing chamber is added under turbulent conditions at ambient temperature to the olefin in the reaction zone of the flow reactor, in such a manner that the reaction temperature is achieved on mixing and the ratio between olefin gas stream and gas stream of the oxidant is from 5:1 to 1:1. |
