METHOD OF OBTAINING ALKYLENE OXIDE USING GAS-PHASE PROMOTER SYSTEM Russian patent published in 2009 - IPC C07D301/10 

FIELD: chemistry, medicine.

SUBSTANCE: additive to reaction of epoxidation represents two-component gas-phase promoter system, which contains chlorine-containing component (for instance, ethyl chloride, methyl chloride, vinyl chloride and ethylene dichloride) and nitrogen-containing component from group of nitrogen monoxide and other compounds able to form in reaction conditions at least one gaseous, increasing efficiency, member of pair of oxidation-reduction semi-reaction, including NO, NO₂, N₂O₃ or N₂O₄. Quantity of each component of said gaseous promoter is taken in such way as to support ratio N* to Z* within the interval from 0.4 to 1, where N* represents equivalent of nitrogen monoxide, in ppmv, ranging from 1 to 20 ppmv, and Z*=(ethyl chloride equivalent (ppmv))x100%/(ethane equivalent (mol %))x100, ranging from 5 to 40 ppmv. Said equivalents are determined depending on concentrations of nitrogen-containing component, chlorine-containing component and ethane or other hydrocarbon at reactor inlet in accordance with stated in i.1 of the formula.

EFFECT: improved is method of obtaining ethylene oxide by means of ethylene epoxidation using catalyst, which contains silver and one efficiency-increasing salt of member of oxidation-reduction semi-reaction pair.

7 cl, 7 tbl, 4 ex