Upgraded solvents in coal liquefaction processes

Patent · Tue Aug 27 04:00:00 EDT 1985

OSTI ID:5790318

Silver, H F; Miller, R L

New solvent compositions and a new two-stage direct coal liquefaction process are provided which permit control of the liquid product state from one consisting primarily of low boiling distillate to one consisting primarily of high boiling fuel oil. The use of the new solvent composition in the process significantly increases distillable liquid yields from coal or lignites. The preferred solvent contains from about 0 to 100 weight percent of pyridine-soluble bottoms, i.e., mineral matter-free normally solid dissolved coal, in which the hydrogen content is maintained at an optimum level by adding from about 0.05 to about 2.0 weight percent hydrogen in a hydrotreating step and from about 0 to 100 weight percent of a coal-derived distillate boiling below about 800/sup 0/ F. to about 1000/sup 0/ F.

• Assignee: In Situ Inc.
• Patent Number(s): US 4537675
• OSTI ID: 5790318
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010403 -- Coal & Coal Products-- Hydrogenation-- (-1987)
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ADDITIVES
AZINES
BOILING POINTS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL LIQUIDS
DISTILLATES
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
HYDROGEN
HYDROGENATION
LIQUEFACTION
LIQUIDS
MINERALS
NONMETALS
OIL YIELDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SOLVENTS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PHYSICAL PROPERTIES
PRODUCTION
PYRIDINES
SOLVENTS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
TSL PROCESS
YIELDS