DEVICE FOR PREPARATION OF CATALYST IN PROCESSES OF DEHYDROGENATION OF PARAFFIN HYDROCARBONS C-C Russian patent published in 2020 - IPC B01J38/30 C07C11/10 C07C11/08 C07C11/06 

FIELD: petroleum chemistry.

SUBSTANCE: invention relates to petrochemistry, in particular to units for dehydrogenating C₃-C₅ paraffin hydrocarbons into corresponding olefin hydrocarbons used to obtain basic monomers for synthetic rubber, as well as in the production of polypropylene, methyl-tert-butyl ether, etc. A device for preparing the reducing-desorption chromia-alumina catalyst circulating in the system, the reactor – regenerator in the processes of dehydrogenation of paraffinic hydrocarbons C₃-C₅ fluidized bed comprising a cylindrical baffle mounted coaxially to the cylindrical housing shell of regenerator 1, having means 16 for supplying regenerated catalyst bubbling distributors 12 for supply of reducing gas, bubbling distributors 14 for supply of inert gas, open ring-shaped space 9 for removal of gaseous products of catalyst preparation, branch pipe 17 for discharge of the prepared catalyst into the reactor, wherein the device can be located inside the regenerator and contain fixed to the bottom of regenerator housing 1 by bottom end face 3, first partition 4 and second partition 5 inside it at a distance, installed coaxially to regenerator cylindrical housing 1, as well as third partition 6 outside at distance of second partition 5, installed coaxially to shell of regenerator housing 1, with upper end face 22 located in upper part of fluidized bed of regenerator in zone 23 of coke burning on spent catalyst incoming from reactor and supplied via burners 24 of fuel gas, having attached to its lower end face ring-shaped bottom 8, which surrounds surface of second partition 5, and is located above upper end face 30 of first partition 4, at that upper end 29 of second partition 5 is located at level or below upper end 22 of third partition 6, and in lower part of second partition 5 below upper end 30 of first partition 4 there are openings 7 for catalyst overflow, besides, device has facility 16 for supply of regenerated catalyst in form of open annular space located above or below distributor 18 for supply to regenerator of oxygen-containing gas between upper end 30 of first partition 4 and surface of second partition 5, and between first partition 4 and second partition 5 below overflow hole 7 there are bubbling distributors 10 for supplying inert gas into section 11 of first fluidized bed, and in the central part of the fluidized bed, which is bounded by second partition 5 above lower bottom 3 of the regenerator casing below overflow hole 7, bubbler-distributor 12 is installed for supplying a reducing gas to section 13 of the second fluidized bed, and above bottom 8 between second and third partitions there is bubbler distributor 14 for supply of inert gas to section 15 of third fluidized bed, wherein above upper end 22 of third partition 6 at some distance up from it first disc 20 is installed in form of cone with vertex, directed upwards, with formation between said end and first disc of open ring-shaped space 9 for removal of gaseous products of preparation from second and third boiling layers together with part of reduced catalyst into upper part of boiling bed of regenerator in zone 23 of coke combustion and fuel gas supplied to burner 24, and in lower part of section 15 of third fluidized bed branch pipe 17 is installed to discharge prepared catalyst into reactor, which is connected to third partition 6 or to its bottom 8.

EFFECT: technical result consists in increase in the efficiency of reduction-desorption preparation of aluminum chromium catalysts with increase in their activity in the dehydrogenation of paraffin hydrocarbons C₃-C₅ with a more compact and efficient design of the preparation unit.

10 cl, 1 dwg