Removal of non-volatile components from a catalytic cracking feed using a reject cracking catalyst

Claim 1

A METHOD OF REMOVING NON-VOLATILE COMPONENTS FROM CATALYTIC CRACKING FEED STOCKS WHICH COMPRISES PASSING REJECT CATALYST FROM A FLUIDIZED CRACKING REGENERATOR INTO A FLUIDIZED KILN MAINTAINED AT A TEMPERATURE OF AT LEAST ABOUT 1100*F., WITHDRAWING HOT REJECT CATALYST FROM SAID KILN AND PASSING THE SAME TO A FLUIDIZED CONTACT ZONE MAINTAINED AT A TEMPERATURE OF AT LEAST ABOUT 900*F., INTRODUCING A HYDROCARBON FEED CONTAINING THE NON-VOLATILE CONTAMINANTS TO A CONTACT ZONE, INTRODUCING SUFFICIENT STEAM TO SAID CONTACT ZONE TO REDUCE THE PARTIAL PRESSURE OF THE FEED INTRODUCED THEREIN, MAINTAINING CONTACT BETWEEN THE REJECT CATALYST AND VAPORIZED FEED FOR A PERIOD OF TIME LESS THAN FIVE SECONDS, PASSING THE FEED AND REJECT CATALYST ARE SEPARATING ZONE WHEREIN VAPORIZED FEED AND REJECT CATALYST ARE SEPARATED, PASSING THE SEPARATED VAPORS TO THE FLUIDIZED REACTION ZONE OF A FLUID CRACKING UNIT, SUBJECTING THE SEPARATED REJECT CATALYST TO STRIPPING GAS, RECYCLING STRIPPED FEED VAPORS TO THE SEPARATING ZONE, RECYCLING REJECT CATALYST TO THE FLUIDIZED KLIN AND WITHDRAWING CONTAMINATED REJECT CATALYST FROM THE KILN TO WASTE DISPOSAL AT SUBSTANTIALLY THE SAME RATE THAT FRESH REJECT CATALYST IS DELIVERED TO SAID KILN.