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

Abstract

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.

Inventors:
 [1]
  1. (Convent Station, NJ)
Issue Date:
Research Org.:
Exxon Research and Engineering Co.
OSTI Identifier:
863652
Patent Number(s):
4222844
Assignee:
Exxon Research & Engineering Co. (Florham Park, NJ) OSTI
DOE Contract Number:  
EF-77-A-01-2893
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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/

Citation Formats

Nizamoff, Alan J. Use of once-through treat gas to remove the heat of reaction in solvent hydrogenation processes. United States: N. p., 1980. Web.
Nizamoff, Alan J. Use of once-through treat gas to remove the heat of reaction in solvent hydrogenation processes. United States.
Nizamoff, Alan J. Tue . "Use of once-through treat gas to remove the heat of reaction in solvent hydrogenation processes". United States. https://www.osti.gov/servlets/purl/863652.
@article{osti_863652,
title = {Use of once-through treat gas to remove the heat of reaction in solvent hydrogenation processes},
author = {Nizamoff, Alan J.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

Patent:

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