Immobilisation of vanadium deposited on catalytic materials during the conversion of oil that contains heavy metals and coke precursors.

摘要

A process is disclosed for catalytic cracking a hydrocarbon oil feed having a 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.