Use of once-through treat gas to remove the heat of reaction in solvent hydrogenation processes

Patent · Tue Jan 01 00:00:00 EST 1980

OSTI ID:863652

Nizamoff, Alan J ^[1]

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1. Convent Station, NJ

In a coal liquefaction process wherein feed coal is contacted with molecular hydrogen and a hydrogen-donor solvent in a liquefaction zone to form coal liquids and vapors and coal liquids in the solvent boiling range are thereafter hydrogenated to produce recycle solvent and liquid products, the improvement which comprises separating the effluent from the liquefaction zone into a hot vapor stream and a liquid stream; cooling the entire hot vapor stream sufficiently to condense vaporized liquid hydrocarbons; separating condensed liquid hydrocarbons from the cooled vapor; fractionating the liquid stream to produce coal liquids in the solvent boiling range; dividing the cooled vapor into at least two streams; passing the cooling vapors from one of the streams, the coal liquids in the solvent boiling range, and makeup hydrogen to a solvent hydrogenation zone, catalytically hydrogenating the coal liquids in the solvent boiling range and quenching the hydrogenation zone with cooled vapors from the other cooled vapor stream.

• Research Organization: Exxon Research and Engineering Co.
• DOE Contract Number: EF-77-A-01-2893
• Assignee: Exxon Research & Engineering Co. (Florham Park, NJ)
• Patent Number(s): US 4222844
• OSTI ID: 863652
• Country of Publication: United States
• Language: English

Related Subjects

once-through
treat
gas
remove
heat
reaction
solvent
hydrogenation
processes
coal
liquefaction
process
feed
contacted
molecular
hydrogen
hydrogen-donor
zone
form
liquids
vapors
boiling
range
thereafter
hydrogenated
produce
recycle
liquid
products
improvement
comprises
separating
effluent
hot
vapor
stream
cooling
entire
sufficiently
condense
vaporized
hydrocarbons
condensed
cooled
fractionating
dividing
streams
passing
makeup
catalytically
hydrogenating
quenching
recycle solvent
hydrogenation process
molecular hydrogen
liquid hydrocarbon
liquid stream
donor solvent
coal liquids
liquefaction zone
liquid hydrocarbons
coal liquid
liquefaction process
coal liquefaction
liquid products
vapor stream
liquid product
boiling range
feed coal
solvent boiling
condensed liquid
solvent hydrogenation
hydrogen-donor solvent
hydrogenation zone
hot vapor
comprises separating
vaporized liquid
/208/