Hydrogen donor solvent coal liquefaction process
A process for liquefying a particulate coal feed to produce useful petroleum-like liquid products, particularly by steps which include: (a) contacting, in a liquefaction zone, said coal feed with a hydrogen donor solvent at temperature and pressure sufficient to hydroconvert and liquefy the coal (b) separating the product from the liquefaction zone by distillation into fractions inclusive of a liquid fraction which contains at least 30 weight percent, and preferably at least 50 weight percent hydrogen donor compounds, particularly those fractions boiling within about the 350/sup 0/--850/sup 0/F range, and preferably within about the 400/sup 0/--700/sup 0/F range, (c) hydrogenating said liquid fraction in a hydrogenation zone, (d) adding to said liquid fraction a solvent characterized as a low molecular weight heterocyclic oxygen or heterocyclic sulfur compound containing, within a molecule, from 2 to about 6 fused rings one or more of which is a five- or six-membered heterocyclic ring having 4 to 5 carbon atoms and from 1 to 2 atoms of oxygen or sulfur, and (e) recycling the hydrogenated liquid solvent mixture to said coal liquefaction zone.
- Assignee:
- Exxon Research and Engineering Co.
- Patent Number(s):
- US 4022680
- OSTI ID:
- 7109227
- Resource Relation:
- Patent File Date: Filed date 17 Dec 1975
- Country of Publication:
- United States
- Language:
- English
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Coal liquefaction process
Coal liquefaction process
Related Subjects
COAL
HYDROGENATION
COAL LIQUIDS
DISTILLATION
ORGANIC SOLVENTS
COAL LIQUEFACTION
HETEROCYCLIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
LIQUEFACTION
ORGANIC COMPOUNDS
SEPARATION PROCESSES
SOLVENTS
THERMOCHEMICAL PROCESSES
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