Coal liquefaction with preasphaltene recycle
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United States of America Patent
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-
Sep 2, 1986
Issued Date -
N/A
app pub date -
Feb 21, 1985
filing date -
Oct 19, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A coal liquefaction system is disclosed with a novel preasphaltene recycle from a supercritical extraction unit to the slurry mix tank wherein the recycle stream contains at least 90% preasphaltenes (benzene insoluble, pyridine soluble organics) with other residual materials such as unconverted coal and ash. This subject process results in the production of asphaltene materials which can be subjected to hydrotreating to acquire a substitute for No. 6 fuel oil. The preasphaltene-predominant recycle reduces the hydrogen consumption for a process where asphaltene material is being sought.
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