REACTIVATING PROPANE DEHYDROGENATION CATALYST Russian patent published in 2017 - IPC B01J38/02 B01J38/12 B01J23/96 C07C5/333 B01J23/62 

FIELD: chemistry.

SUBSTANCE: invention relates to a method, that enables to obtain reactivated alkane dehydrogenation catalyst. Treatment within a regenerator comprises following sequential steps: (a) heating deactivated catalyst to a temperature of at least 660 °C using heat generated by combusting coke, contained on partially deactivated catalyst, and a fuel source other than said coke; and (b) subjecting further deactivated catalyst at a temperature of at least 660 °C while exposing to a flow of an oxygen-containing gas, which essentially does not contain combustible hydrocarbons, carbon oxides and water vapour, for a period of time longer than two minutes. Method may also (optionally) include a step (c) for maintaining oxygen-containing reactivated catalyst from step (b) at a temperature of at least 660 °C while exposing reactivated catalyst to a flow of stripping gas that is substantially free of molecular oxygen and combustible materials.

EFFECT: present invention provides improved characteristics of catalyst and increased number of response/reactivation cycles.

7 cl, 13 tbl, 7 ex