Fluidized catalytic cracking regeneration process

Abstract From the Canadian patent

A process is described herein for regeneration of spent coke con-, taminated fluidised cracking catalyst by burning coke therefrom with a molEcular oxygen containing regeneration gas in a fluidized dense phase bed and, for burning substantially all carbon monoxide formed to carbon dioxide. The process includes charges spent catalyst vertically downwards into a lower regeneration zone and an oxygen containing primary regeneration gas is passed under turbulent flow upwards through the lower regeneration zone and into the bottom of an upper regeneration zone, The oxygen-containing primary regeneration gas contains about 25 to 40 percent of the stoichiometric amount of oxygen required for …