A method for the simultaneous processing of gasoline - run - vakuumresid and cracked residual

摘要

Vacuum resid and cracked residuum such as decant oil or thermal tar are processed together to reduce the ultimate yield of coke, asphalt and fuel oil. The vacuum resid is donor cracked, and the donor cracker effluent is quenched with decant oil or thermal tar and then fractionated. Fractionator bottoms are vacuum distilled, and vacuum tower overheads are hydrogenated to produce donor for the donor cracker.