Coal liquefaction
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United States of America Patent
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-
Jun 11, 1985
Issued Date -
N/A
app pub date -
Aug 13, 1984
filing date -
Aug 5, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a two-stage liquefaction wherein coal, hydrogen and liquefaction solvent are contacted in a first thermal liquefaction zone, followed by recovery of an essentially ash free liquid and a pumpable stream of insoluble material, which includes 850.degree. F.+ liquid, with the essentially ash free liquid then being further upgraded in a second liquefaction zone, the liquefaction solvent for the first stage includes the pumpable stream of insoluble material from the first liquefaction stage, and 850.degree. F.+ liquid from the second liquefaction stage.
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