Process for coal liquefaction by separation of entrained gases from slurry exiting staged dissolvers

Patent · Sat Jan 01 00:00:00 EST 1983

OSTI ID:864679

Givens, Edwin N ^[1]; Ying, David H. S. ^[2]

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1. Bethlehem, PA
2. Macungie, PA

There is described an improved liquefaction process by which coal is converted to a low ash and low sulfur carbonaceous material that can be used as a fuel in an environmentally acceptable manner without costly gas scrubbing equipment. In the process, coal is slurried with a solvent, passed through a preheater and at least two dissolvers in series in the presence of hydrogen-rich gases at elevated temperatures and pressures. Solids, including mineral ash and unconverted coal macerals are separated from the condensed dissolver effluent. In accordance with the improved process, fresh hydrogen is fed to each dissolver and the entrained gas from each dissolver is separated from the slurry phase and removed from the reactor system before the condensed phase is passed to the next dissolver in the series. In accordance with another process, the feeds to the dissolvers are such that the top of each downstream dissolver is used as a gas-liquid separator.

• Research Organization: INTERNATIONAL COAL REFINING CO
• DOE Contract Number: AC05-78OR03054
• Assignee: International Coal Refining Company (Allentown, PA)
• Patent Number(s): US 4400261
• OSTI ID: 864679
• Country of Publication: United States
• Language: English

Related Subjects

process
coal
liquefaction
separation
entrained
gases
slurry
exiting
staged
dissolvers
described
improved
converted
ash
sulfur
carbonaceous
material
fuel
environmentally
acceptable
manner
costly
gas
scrubbing
equipment
slurried
solvent
passed
preheater
series
presence
hydrogen-rich
elevated
temperatures
pressures
solids
including
mineral
unconverted
macerals
separated
condensed
dissolver
effluent
accordance
fresh
hydrogen
fed
phase
removed
reactor
feeds
top
downstream
gas-liquid
separator
unconverted coal
slurry phase
improved process
elevated temperatures
liquefaction process
elevated temperature
coal liquefaction
carbonaceous material
gas scrubbing
rich gas
coal macerals
mineral ash
hydrogen-rich gas
environmentally acceptable
improved liquefaction
condensed phase
staged dissolvers
gas-liquid separator
sulfur carbonaceous
hydrogen-rich gases
including mineral
entrained gas
entrained gases
acceptable manner
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