Process and apparatus for coal hydrogenation

Patent · Fri Jan 01 00:00:00 EST 1988

OSTI ID:866555

Ruether, John A ^[1]

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1. McMurray, PA

In a coal liquefaction process an aqueous slurry of coal is prepared containing a dissolved liquefaction catalyst. A small quantity of oil is added to the slurry and then coal-oil agglomerates are prepared by agitation of the slurry at atmospheric pressure. The resulting mixture of agglomerates, excess water, dissolved catalyst, and unagglomerated solids is pumped to reaction pressure and then passed through a drainage device where all but a small amount of surface water is removed from the agglomerates. Sufficient catalyst for the reaction is contained in surface water remaining on the agglomerates. The agglomerates fall into the liquefaction reactor countercurrently to a stream of hot gas which is utilized to dry and preheat the agglomerates as well as deposit catalyst on the agglomerates before they enter the reactor where they are converted to primarily liquid products under hydrogen pressure.

• Research Organization: USDOE Pittsburgh Energy Technology Center (PETC), PA (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4735706
• OSTI ID: 866555
• Country of Publication: United States
• Language: English

Related Subjects

process
apparatus
coal
hydrogenation
liquefaction
aqueous
slurry
prepared
containing
dissolved
catalyst
quantity
oil
added
coal-oil
agglomerates
agitation
atmospheric
pressure
resulting
mixture
excess
water
unagglomerated
solids
pumped
reaction
passed
drainage
device
amount
surface
removed
sufficient
contained
remaining
fall
reactor
countercurrently
stream
hot
gas
utilized
dry
preheat
deposit
enter
converted
primarily
liquid
products
hydrogen
excess water
resulting mixture
liquefaction process
coal liquefaction
atmospheric pressure
hot gas
liquid products
liquid product
aqueous slurry
liquefaction reactor
hydrogen pressure
surface water
coal hydrogenation
water remaining
liquefaction catalyst
coal-oil agglomerates
coal hydrogen
prepared containing
dissolved liquefaction
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