Hydrogenation of coal and subsequent liquefaction of hydrogenated undissolved coal
This patent describes a continuous two reactor stage coal conversion process for catalytic hydrogenation of coal particles and subsequent liquefaction thereof for producing coal-derived hydro-carbon liquid and gas products. The process compromising: mixing solid coal particles having particle size ranging from about 20 mesh to about 400 mesh with hydrocarbon liquid solvent in a solvent/coal weight ratio at least sufficient to provide a flowable coal/oil slurry feed of the solid coal particles, a substantial portion of the hydrocarbon solvent having a normal boiling point ranging from about 400{degrees}F. to about 1100{degrees}F.; passing the coal/oil slurry and hydrogen upwardly through a first reaction zone containing hydrocarbon solvent liquid which is partly generated from the coal and substantially hydrogenated therein; withdrawing the coal/oil slurry effluent containing the hydrogenated coal particles from the first reaction zone and passing the coal/oil slurry through a second reaction zone; passing the gas and liquid fractions from the second reaction zone to a gas-liquid-solids separation zone, from which separation zone a coal-derived hydrocarbon liquid stream containing a reduced solids concentration is recycled directly without further hydrogenation to the coal slurrying step to provide at least part of the hydrocarbon solvent liquid for the coal/oil slurry feed; and recovering from the separation zone hydrocarbon liquid distillate and gaseous hydrocarbon products. Whereby the substantial catalytic hydrogenation of the coal particles in the first reaction zone before catalytic liquefaction in the second reaction zone provides increased yields of C4-975{degrees}F. fraction hydrocarbon liquid products, with the yield of cyclohexane soluble product material being about 60-90 W% of the coal feed.
- Assignee:
- HRI, Inc., Lawrenceville, NJ
- Patent Number(s):
- US 4879021; A
- Application Number:
- PPN: US 7-237636A
- OSTI ID:
- 7054919
- Resource Relation:
- Patent File Date: 26 Aug 1988
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
HYDROGENATION
CATALYSTS
COAL LIQUEFACTION
COAL LIQUIDS
PRODUCTION
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
LIQUEFACTION
LIQUIDS
MATERIALS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction