Simultaneous crushing and retorting of oil shale with fluid jets

Size separation of oil shale particles for efficient retorting

Solar heated oil shale pyrolysis process

Solar retorting of oil shale

Solid hydrocarbon liquefaction with a catalyst having chromium a

Solid liquid extraction

Solvent extraction method

Solvent extraction method

Solvent extraction method

Solvent extraction of oil from tar sands utilizing a chlorinated

Solvent extraction of oil from tar sands utilizing a trichloroet

Solvent extraction of oil shale or tar sands

Solvent extraction of tar sand

Solvent extraction process

Solvent extraction process

Solvent extraction process for tar sands

Solvent refining of coal using octahydrophenanthrene-enriched so

Split hub wheel apparatus and use of same for shale oil retortin

Spouted-bed shale retorting process

Staged burning of retorted carbon-containing solids