METHOD OF CATALYTIC CRACKING FOR TREATMENT OF FRACTIONS WITH LOW CONRADSON CARBON RESIDUE Russian patent published in 2016 - IPC C10G11/18 B01J19/32 B01J8/24 

FIELD: chemistry.

SUBSTANCE: invention relates to a catalytic cracking process in fluid bed of a slightly coking carbon feedstock, having Conradson carbon residue equal to or less than 0.1 wt% and hydrogen content equal or greater than 12.7 wt% comprising at least a feedstock cracking step in presence of a catalyst, a step for separation/stripping effluent coked catalyst particles and a regeneration step of said particles by partial or complete combustion of coke, and recycle of catalyst homogeneously distributed and slightly coked catalyst before regeneration of at least one coking carbonaceous and/or hydrocarbon effluent. Method is characterised by that quantity of coking effluent fed into coked catalyst is adjusted to provide an amount of additional coke Q_r of catalyst and satisfy equation (I): Q_t=Q_i+Q_r (I), where Q_i is initial coke content of coked catalyst after cracking of feedstock, and Q_t or Delta coke is content of coke burned by complete or partial combustion, necessary to maintain thermal balance of process and to maintain regenerated catalyst at a temperature equal to or higher than 690 °C, preferably, wherein said coking effluent has content of aromatic compounds greater than 50 wt% and comprising 20 wt% or more. Invention also relates to a device for implementation of said method.

EFFECT: use of present invention enables to compensate for heat balance of plant.

20 cl, 3 dwg, 6 tbl, 2 ex