Mineral oils: processes and products – Products and compositions – Lubricating oils
Patent
1980-09-04
1983-12-20
Wright, William G.
Mineral oils: processes and products
Products and compositions
Lubricating oils
C10G 106
Patent
active
044216327
ABSTRACT:
Coal is mixed with emulsifier oil to form a slurry. The coal slurry is pumped to reaction pressure, heated and subjected to catalytically accelerated hydrogenation in the presence of hydrogen. At least a portion of hot gases produced during hydrogenation is drawn off from the reactor and is mixed with the coal slurry which has been pumped to the reaction pressure. Direct heat exchange occurs between the hot gases in the coal slurry causing the condensation heat of the hot gases to be released to the coal slurry. The released heat is sufficient to heat dry and at least partially degasify the incoming coal slurry. Gases are separated from the resultant mixture and the remaining slurry is directly communicated to the reactor for hydrogenation. The gas which leaves the slurry mixture gives up heat to incoming hydrogen. A condensate of the gas is distilled and heavy oil is returned to the slurry mixture. Remaining gas is washed in an oil wash facility from which hydrogen free gas is withdrawn and hydrogen is returned to the hydrogen feed. The liquid phase from the reactor is vacuum distilled; a solid residue is removed, and heavy oil is returned to an emulsifier vessel to mix with the incoming coal.
REFERENCES:
patent: 2676908 (1954-04-01), Novel
patent: 3652446 (1972-03-01), Dengler et al.
patent: 4189374 (1980-02-01), Kirby et al.
patent: 4222844 (1980-09-01), Nizanoff
Creighton Wray James
Wright William G.
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