Fluid coking with the addition of perovskite-containing catalysts

Claim 1

In a fluid coking process comprising the steps of: contacting a carbonaceous chargestock having a Conradson carbon content of at least about 5 weight percent with hot fluidized solids in a fluidized coking bed contained in a coking zone maintained in a fluidized state by the introduction of a fluidizing gas and operated at coking conditions, including a temperature ranging from about 850° to about 1,400° F., to produce a vapor phase product and a solid carbonaceous material which deposits on said fluidized solids, the improvement which comprises the presence of a cracking catalyst in said cooking zone in a weight ratio of said catalyst to said carbonaceous feed ranging from about 0.1:1 to about 1:1, said cracking catalyst comprising a perovskite having at least one transition metal cation selected from the group consisting of elements having atomic numbers ranging from 21 through 30, from 39 through 48, from 57 through 80 and from 89 through 92.