Abstract: The present invention discloses a process for the catalytic cracking of a weakly coking feedstock having a Conradson carbon residue of 0.1% by weight and a hydrogen content of greater than 12.7% by weight, comprising at least a feedstock cracking zone, a zone for separating/stripping the effluents from the coked catalyst particles and a zone for regenerating said particles, characterized in that at least a solid carbon material in the fluidized state, having a carbon content equal to or greater than 80% by weight, is injected upstream of and/or during the catalyst regeneration step into a dense bed of coked catalyst.

Abstract: Regenerator for catalytic cracking unit comprising a first part occupied by a dense fluidized bed of catalyst and a second part positioned above the first part and occupied by a fluidized bed of low solid particles density, the said second part comprising one internal device covering, by projection onto the plane of the cross section of the said vessel of the regenerator, at least 80% of the said cross section, the said regenerator being equipped with at least one cyclone for separating gases/solids in the mixture derived from the low-density bed, the said cyclone being placed outside the vessel of the regenerator.