This invention relates to a novel method for economically processing
vacuum residue from heavy crude oils by selectively processing the
difficult and easy components in reactors whose design and operating
conditions are optimized for the specific feed. The process utilizes an
integrated solvent deasphalting (SDA)/ebullated-bed design wherein the
heavy vacuum residue feedstock is initially sent to an SDA unit operated
with C.sub.4/C.sub.5 solvent to achieve a high deasphalted oil (DAO)
yield. The resulting SDA products, namely asphaltenes and DAO are
separately treated in ebullated-bed reactor(s) systems whose design and
operating conditions are optimized for a particular feedstock. The
resulting net conversion, associated distillate yield and product
qualities are greatly improved relative to treatment of the entire
residue feedstock in a common ebullated-bed reactor system.