Lead pressured extraction of carbonaceous material

Liquefaction of acid treated coal

Liquefaction of calcium-containing coals

Liquefaction of calcium-containing coals

Liquefaction of calcium-containing subbituminous coals and coals

Liquefaction of calcium-containing subbituminous coals and coals

Liquefaction of carbonaceous material with hydrogen and naphtha-

Liquefaction of carbonaceous materials

Liquefaction of carbonous materials with vapor phase hydrogen do

Liquefaction of coal

Liquefaction of coal

Liquefaction of coal

Liquefaction of solid carbonaceous materials

Liquefaction of solid carbonaceous materials

Liquefaction of sub-bituminous and lignitic coal

Liquefaction process

Liquefaction process

Liquefaction process for solid carbonaceous materials containing

Liquefaction process wherein solvents derived from the material

Liquefaction with microencapsulated catalysts