Co-processing of carbonaceous solids and petroleum oil
Coal hydroconversion process comprising solvent extraction (OP-3
Coal liquefaction process utilizing coal/CO.sub.2 slurry feedstr
Liquefaction of coal with aqueous carbon monoxide pretreatment
Low-sulfur fuels from coals
Process for recovering hydrocarbons from a carbon containing...
Two-stage pyrolysis of coal for producing liquid hydrocarbon fue