Liquefaction of sub-bituminous and lignitic coal. [12 claims; 550 to 750/sup 0/F, 30 to 300 psig]

Patent · Tue Jun 07 00:00:00 EDT 1977

OSTI ID:7255984

Sze, M C; Snell, G J

In the liquefaction of a sub-bituminous and/or lignitic coal, prior to the liquefaction, the coal is soaked at a temperature of from 550 to 750/sup 0/F and a pressure of from 30 to 300 psig for a time sufficient to remove at least 10% of the organic oxygen present in the coal to thereby reduce the hydrogen requirements of the liquefaction. The liquefaction is effected with a pasting solvent derived from the sub-bituminous and/or lignitic coal having a 5 volume percent distillation temperature of at least 550/sup 0/F and containing at least 25 weight percent of material boiling above 800/sup 0/F. The use of such a pasting solvent provides for improved dispersion of the coal particles during the liquefaction. 12 claims, 1 figure.

• Assignee: Lummus Co.
• Patent Number(s): US 4028221
• OSTI ID: 7255984
• Resource Relation: Patent File Date: Filed date 6 Jun 1975
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL LIQUEFACTION
COAL PREPARATION
FLOWSHEETS
ORGANIC OXYGEN COMPOUNDS
SOLVENT EXTRACTION
HIGH TEMPERATURE
LIGNITE
MEDIUM PRESSURE
REMOVAL
SUBBITUMINOUS COAL
BROWN COAL
CARBONACEOUS MATERIALS
COAL
COMMINUTION
DIAGRAMS
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
LIQUEFACTION
ORGANIC COMPOUNDS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction