Recovery of crude oil utilizing hydrogen
Recovery of hydrocarbons from coal
Recovery of oil by in situ hydrogenation
Recovery of petroleum from viscous asphaltic petroleum containin
Recovery of products from oil shale
Recovery of viscous oil by unheated air injection, followed by i
Recovery of viscous oil from asphaltic oil-containing formations
Recovery of viscous oil from geological reservoirs using hydroge
Reduction of shale oil pour point
Removal of phenols in groundwater after underground gasification
Removal of sulfur dioxide from process gas using treated oil sha
Removing hydrogen sulfide from a gas
Removing sulfur dioxide from gas streams with retorted oil shale