Recovery of aromatic hydrocarbons and a non-aromatic raffinate s
Recovery of deasphalting solvent
Recovery of solvent from a hydrocarbon extract
Recovery of solvent in hydrocarbon processing systems
Reducing the metals content of petroleum feedstocks
Refinery atmospheric pipestill with ammonia stripping
Refinery atmospheric pipestill with methanol stripping
Refining highly aromatic lube oil stocks
Removal of acidic halides from gas streams
Removal of organic sulfur compounds from FCC gasoline using rege
Removal of particulate solids from a hot hydrocarbon slurry oil
Removal of solvent
Removing NH.sub.3 and H.sub.2 S from aqueous streams