PROCEDURE FOR HYDROCARBON STOCK CATALYTIC CRACKING Russian patent published in 2011 - IPC C10G11/18 

FIELD: oil and gas production.

SUBSTANCE: invention refers to procedure for hydrocarbon stock catalytic cracking at fine dispersed catalyst for production of target products. The procedure consists in contacting raw stock and catalyst in a direct flow reactor. Successively spent catalyst is stripped from entrained hydrocarbons in a stripping column by processing catalyst with steam under stepped-counter flow conditions and with implementation of conic ring-like and disk partitions. Part of steam passes through orifices in the partitions. Steam is directed via nozzle orifices made on one or three lower partitions at amount of 10-45% of its consumption into the stripper. Also, steam from the nozzle orifices is exhausted at distance from partition surface equal to 0.04-0.09 of diametre of the stripper.

EFFECT: increased degree of catalyst stripping, raised stability of catalyst circulation, reduced thermo-steam deactivation of catalyst and increased output of cracking target products.

5 ex, 1 tbl, 2 dwg