Metal contaminant removal from catalytic cracking feedstock

Claim 1

A METHOD FOR TRAEATING A METALS-CONTAMINATED OIL WHICH IS TO BE CRACKED AT AN ELEVATED TEMPERATURE IN THE PRESENCE OF A CATALYST WHICH COMPRISES FLOWING SAID OIL IN LIQUID PHASE AT A TEMPERATURE OF AT LEAST ABOUT 500* F. AND NOT IN EXCESS OF A TEMPERATURE AT WHICH SUBSTANTIAL DECOMPOSITION OF SAID OIL WILL OCCUR UPWARDLY THROUGH A TREATING ZONE COUNTERCURRENT TO A DOWNWARDLY MOVING BED OF CONTIGUOPUS ADSORPTIVE TREATING SOLIDS ADAPTED TO REMOVE CONTAMINATING METALS FROM SAID OIL UNDER SAID CONDITIONS OF OPERATION, INTRODUCING BELOW THE POINT OF FEED OF SAID METALS-CONTAMINATED OIL A WASH OIL IN A MANNER SO AS TO CAUSE UPWARD MOVEMENT OF SAID METALS-CONTAMINATED OIL THROUGH SAID BED, REMOVING THUS CLEANED OIL FROM AN UPPER PORATION OF THE ZONE AND PASSING SAID OIL TOGETHER WITH SOME OF SAID WASH OIL INTO CONTACT WITH A CRACKING CATALYST UNDER HYDROCARBON CRACKING CONDITIONS THUS OBTAINING A HIGH YIELD OF DESIRED CONVERSION PRODUCTS OVER A PERIOD OF TIME CONSIDERABLY LONGER AND WITH LESS CARBON FORMATION THAN COULD BE OBTAINED OTHERWISE.

Claim 2

A METHOD FOR TRAEATING A METALS-CONTAMINATED OIL WHICH IS TO BE CRACKED AT AN ELEVATED TEMPERATURE IN THE PRESENCE OF A CATALYST WHICH COMPRISES FLOWING SAID OIL IN LIQUID PHASE AT A TEMPERATURE OF AT LEAST ABOUT 500* F. AND NOT IN EXCESS OF A TEMPERATURE AT WHICH SUBSTANTIAL DECOMPOSITION OF SAID OIL WILL OCCUR UPWARDLY THROUGH A TREATING ZONE COUNTERCURRENT TO A DOWNWARDLY MOVING BED OF CONTIGUOPUS ADSORPTIVE TREATING SOLIDS ADAPTED TO REMOVE CONTAMINATING METALS FROM SAID OIL UNDER SAID CONDITIONS OF OPERATION, INTRODUCING BELOW THE POINT OF FEED OF SAID METALS-CONTAMINATED OIL A WASH OIL IN A MANNER SO AS TO CAUSE UPWARD MOVEMENT OF SAID METALS-CONTAMINATED OIL THROUGH SAID BED, REMOVING THUS CLEANED OIL FROM AN UPPER PORATION OF THE ZONE AND PASSING SAID OIL TOGETHER WITH SOME OF SAID WASH OIL INTO CONTACT WITH A CRACKING CATALYST UNDER HYDROCARBON CRACKING CONDITIONS THUS OBTAINING A HIGH YIELD OF DESIRED CONVERSION PRODUCTS OVER A PERIOD OF TIME CONSIDERABLY LONGER AND WITH LESS CARBON FORMATION THAN COULD BE OBTAINED OTHERWISE.