Radial flow retorting process with trays and downcomers

Re-refining lubricating oil in a bed of oil shale

Reactor residuum concentration control in hydroconversion of coa

Reagent and process for recovering oil and kerogens from oil sha

Recovery of a carbonaceous liquid with a low fines content

Recovery of a carbonaceous liquid with a low fines content

Recovery of bitumen from aqueous streams via superatmospheric pr

Recovery of bitumen from tar sand

Recovery of bitumen from tar sands

Recovery of bitumen from tar sands sludge using additional water

Recovery of bituminous products from tar sands

Recovery of catalyst from coal liquefaction residues

Recovery of catalysts from the hydrogenation of coal

Recovery of coal liquefaction catalysts

Recovery of fuel from oil shale

Recovery of hydrocarbon from dilution centrifuging tailings

Recovery of hydrocarbon values by controlled eduction and oxidat

Recovery of hydrocarbon values from low organic carbon content c

Recovery of hydrocarbonaceous material from tar sands

Recovery of hydrocarbons from tar sands