Fluid coking with solvent separation of recycle oil

Claim 1

In a fluid coking process comprising the steps of: (a) contacting a carbonaceous chargestock with hot fluidized solids in a fluidized bed contained in a coking zone at coking conditions to produce coke which deposits on said fluidized solids and a vapor phase product, including heavy and light normally liquid hydrocarbons, and (b) passing said vapor phase product of step (a) to a scrubbing zone and separating at least a portion of said heavy hydrocarbons from said vapor phase product in said scrubbing zone, said separated hydrocarbons having a Conradson carbon content ranging from about 5 to about 50 weight percent, the improvement which comprises: (c) subsequently contacting at least a portion of said separated hydrocarbons, said portion of separated hydrocarbons having a Conradson carbon content ranging from about 5 to about 50 weight percent, with a solvent in a solvent separation zone at separation conditions to separate said heavy hydrocarbons into a high Conradson carbon hydrocarbonaceous product and a low Conradson carbon hydrocarbonaceous product; (d) recycling at least a portion of said high Conradson carbon product to said coking zone, and (e) recovering said low Conradson carbon hydrocarbonaceous product of step (c).