REGENERATION OF ALKANE DEHYDROGENATION CATALYSTS Russian patent published in 2013 - IPC C07C5/333 C07C11/02 C07C11/06 B01J38/12 B01J38/16 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of dehydrogenating alkanes, according to which a mixture containing hydrocarbons, particularly alkanes, which can contain water vapour, is continuously fed through a catalyst bed at ordinary dehydrogenation conditions. The many-hours-long dehydrogenation step is followed by a step with bleeding of oxygen-free gas through a reactor layer in order to blow and remove reaction gas from the reactor layer, and this is followed by a step for bleeding oxygen-containing regeneration gas in order to remove deposits on the catalyst formed during the dehydrogenation reaction. This is followed by a step for bleeding oxygen-free gas in order to blow and remove regeneration gas from the reactor. Duration of bleeding oxygen-containing gas during catalyst regeneration is equal to or less than 70% of the total duration of regeneration, total regeneration time is equal to 1 hour and regeneration starts after a seven-hour step of obtaining the product. The method is characterised by that regeneration starts with a five-minute blowing step, followed by a step for regeneration with a gas which contains oxygen and water vapour for 20 minutes, followed by an additional blowing step.

EFFECT: method enables to preserve catalyst activity and selectivity with respect to the desired process and after many regeneration cycles.

12 cl, 5 ex, 4 tbl