METHOD FOR REGENERATION OF CHROMIUM ALUMINA CATALYST AND REGENERATOR FOR ITS IMPLEMENTATION Russian patent published in 2021 - IPC B01J8/18 B01J29/90 B01J38/30 C07C5/333 

FIELD: chemistry.

SUBSTANCE: method for catalyst regeneration in the processes of dehydrogenation of C₃-C₅ paraffinic hydrocarbons with a fluidized bed of a chromium alumina catalyst circulating in a reactor-regenerator system is proposed, including feeding a mixture of spent catalyst and a transport gas to the top of the fluidized bed of the regenerator, contacting the catalyst with an oxygen-containing gas supplied under the fluidized bed when using sectioning grids with countercurrent movement of catalyst and gas through them, heating the catalyst in the catalyst heating zone (10) in the upper part of the fluidized bed by burning coke on the spent catalyst and supplied fuel gas, subsequent oxidation of the catalyst with desorption of oxidation products by the supplied oxygen-containing gas in the zone oxidation of the catalyst (11) in the lower part of the fluidized bed of the regenerator and further withdrawal of the regenerated catalyst for reduction-desorption preparation before feeding it into the reactor, where the catalyst is heated in the recirculation mode of a part of the circulating catalyst using a vertical baffle dividing the fluidized bed of the catalyst heating zone (10) into pressure head (18) and lifting (17) sections, and supplying a mixture of spent catalyst and transport gas to the bottom of the lifting section (17). Also proposed is a regenerator of the C₃-C₅ paraffinic hydrocarbon dehydrogenation system with a fluidized bed of fine-grained chromium alumina catalyst, which is used in the method described above.

EFFECT: invention is aimed at increasing efficiency of catalyst regeneration in the processes of dehydrogenation of paraffinic hydrocarbons by increasing the activity of the catalyst, reducing the consumption of the catalyst, oxygen-containing gas for regeneration, erosion of the elements of the regenerator structure.

20 cl, 3 dwg