CALCINATION IN INERT GAS IN PRESENCE OF LOW-CONCENTRATION OXIDISING COMPONENT Russian patent published in 2011 - IPC B01J23/68 B01J23/04 B01J37/02 B01J37/08 B01J37/14 C07D301/10 

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method of producing silver catalysts used in gas phase synthesis of ethylene oxide from ethylene and oxygen. Described is a method of producing a catalyst, involving saturation of an inert substrate with a solution which contains a catalytically effective amount of a compound which contains silver, a promoting amount of a compound which contains a transition metal, calcination of the saturated substrate by heating at temperature ranging from approximately 200°C to approximately 600°C for a period of time sufficient for reducing the silver compound to metallic silver, and for decomposition and removal of almost all organic substances; heating is carried out in an atmosphere which includes a combination of an inert gas and from approximately 10 parts per million to approximately 500 parts per million of a gas which contains an oxygen-containing oxidising component. The invention describes a catalyst produced using said method, and a method of oxidising ethylene to ethylene oxide using molecular oxygen in gaseous phase in the presence of the obtained catalyst in a fixed layer in a tubular reactor.

EFFECT: improved catalyst activity and selectivity.

25 cl, 1 ex, 1 dwg