METHOD FOR CATALYTIC DEHYDRATION Russian patent published in 2021 - IPC C07C5/333 C07C11/06 

FIELD: catalytic dehydration.

SUBSTANCE: invention relates to a catalytic dehydrogenation method comprising: catalytic dehydrogenation of a hydrocarbon feed in the presence of a dehydrogenation catalyst in a fluidized bed of a catalytic dehydrogenation reactor to obtain a product stream comprising a used catalyst and at least one dehydrogenated hydrocarbon; separating the used catalyst from the gaseous components of the product stream; supplying the used catalyst to a reactor section for fluidizing the recirculated catalyst and to a stripping section separate from the catalyst fluidizing section; in the catalyst fluidization section, a fluidizing gas, which includes methane, natural gas, ethane, hydrogen, nitrogen, or any combination thereof, is mixed with a used catalyst stream directed to the catalyst fluidization section to form a recycle catalyst stream; in the stripping section, the stripping gas is contacted with the used catalyst sent to the stripping section to obtain the stripped used catalyst; recycling the recirculated catalyst stream either directly or indirectly to a fluidized bed of the catalytic dehydrogenation reactor; and supplying at least a portion of the stripped spent catalyst for regeneration according to the present method.

EFFECT: using the proposed method allows recycling dehydrogenation catalyst while maintaining its activity and selectivity.

12 cl, 1 tbl, 6 ex, 9 dwg