Disposal of spent oil shale and other materials

Distilling shale oil from oil shale

Double solvent extraction of organic constituents from tar sands

Drying and dedusting process

Dual control system for tailings outlet of primary separation ve

Emulsion catalyst for hydrogenation processes

Enhanced oil recovery from western United States type oil shale

Enhanced recovery of hydrocarbonaceous fluids from oil shale

Enhanced recovery of hydrocarbonaceous fluids from the oil shale

Enhanced removal of nitrogen and sulfur from oil-shale

Extra light hydrocarbon liquids

Extraction and upgrading of fossil fuels using fused caustic and

Extraction of oil shales and tar sands

Extraction of oil using amides

Extraction of tar sands or oil shale with organic sulfoxides or

Extraction process

Feed mixing chute and packed bed for pyrolyzing hydrocarbonaceou

Fine particulate removal from oil shale on a travelling grate re

Finished lubricating comprising lubricating base oil with...

Fluid bed retorting process with multiple feed lines