Multiple-stage hydrogen-donor coal liquefaction
An improved process is claimed for liquefying coal and similar solid carbonaceous materials wherein the liquefaction is accomplished in a plurality of zones or stages and wherein the temperature is increased either linearly or nonlinearly in the first zone or stage, aromatics which are produced, liberated or contained in the solvent are separated after the first zone or stage and the liquefaction is continued in at least one other stage, at a temperature at least as high as the final temperature in the first zone or stage. In a preferred embodiment, the temperature in the first stage will be increased at least 50/sup 0/ F. The improved process results in a higher conversion of carbon contained in the coal or similar solid carbonaceous material to liquid products.
- Assignee:
- Exxon Research And Engineering Co
- Patent Number(s):
- US 4338182
- OSTI ID:
- 7055275
- Resource Relation:
- Patent File Date: Filed date 13 Oct 1978; Other Information: PAT-APPL-950951
- Country of Publication:
- United States
- Language:
- English
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Donor solvent coal liquefaction with bottoms recycle at elevated pressure
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Related Subjects
COAL LIQUEFACTION
COAL LIQUIDS
YIELDS
DISTILLATION
HYDROGEN TRANSFER
PRODUCTION
SEPARATION PROCESSES
SLURRIES
SOLVENTS
VACUUM SYSTEMS
ZONES
DISPERSIONS
FLUIDS
LIQUEFACTION
LIQUIDS
MIXTURES
SUSPENSIONS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction