Immobilization of vanadia deposited on catalytic materials during carbo-metallic oil conversion

摘要

A process is disclosed for catalytic cracking a hydrocarbon oil feed having significant vanadium content to produce lighter products. The catalyst, from the cracking step, coated with coke and vanadium in an oxidation state less than +5, is regenerated in the presence of an oxygen-containing gas at a temperature high enough to burn off a portion of the coke under conditions keeping the vanadium in an oxidation state less than +5.