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

Patent · Sat Jan 01 04:00:00 EST 1983

OSTI ID:864679

Givens, Edwin N.; Ying, David H. S.

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 Company, Allentown, PA (United States)
• DOE Contract Number: AC05-78OR03054
• Assignee: International Coal Refining Company (Allentown, PA)
• Patent Number(s): 4,400,261
• Application Number: 06/308,724
• OSTI ID: 864679
• Country of Publication: United States
• Language: English

Related Subjects

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acceptable
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ash
carbonaceous
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coal
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entrained
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environmentally
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exiting
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hydrogen
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including
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macerals
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mineral
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scrubbing
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series
slurried
slurry
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solids
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staged
staged dissolvers
sulfur
sulfur carbonaceous
temperatures
top
unconverted
unconverted coal