Liquefaction of solid carbonaceous material with catalyst recycle
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United States of America Patent
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Jun 16, 1992
Issued Date -
N/A
app pub date -
Jan 9, 1989
filing date -
Sep 17, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In the two stage liquefaction of a carbonaceous solid such as coal wherein coal is liquefied in a first stage in the presence of a liquefaction solvent and the first stage effluent is hydrogenated in the presence of a supported hydrogenation catalyst in a second stage, catalyst which has been previously employed in the second stage and comminuted to a particle size distribution equivalent to 100% passing through U.S. 100 Mesh, is passed to the first stage to improve the overall operation.
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