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Title: Coal liquefaction process

Abstract

A process for liquefying a particulate coal feed to produce useful petroleum-like liquid products which comprises contacting; in a series of two or more coal liquefaction zones, or stages, graded with respect to temperature, an admixture of a polar compound; or compounds, a hydrogen donor solvent and particulate coal, the total effluent being passed in each instance from a low temperature zone, or stage to the next succeeding higher temperature zone, or stage, of the series. The temperature within the initial zone, or stage, of the series is maintained about 70.degree. F and 750.degree. F and the temperature within the final zone, or stage, is maintained between about 750.degree. F and 950.degree. F. The residence time within the first zone, or stage, ranges, generally, from about 20 to about 150 minutes and residence time within each of the remaining zones, or stages, of the series ranges, generally, from about 10 minutes to about 70 minutes. Further steps of the process include: separating the product from the liquefaction zone into fractions inclusive of a liquid solvent fraction; hydrotreating said liquid solvent fraction in a hydrogenation zone; and recycling the hydrogenated liquid solvent mixture to said coal liquefaction zones.

Inventors:
 [1]
  1. (Baytown, TX)
Publication Date:
OSTI Identifier:
863215
Patent Number(s):
US 4123347
Assignee:
Exxon Research & Engineering Co. (Linden, NJ) OSTI
DOE Contract Number:  
E(49-18)-2353
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
coal; liquefaction; process; liquefying; particulate; feed; produce; useful; petroleum-like; liquid; products; comprises; contacting; series; zones; stages; graded; respect; temperature; admixture; polar; compound; compounds; hydrogen; donor; solvent; total; effluent; passed; instance; zone; stage; succeeding; initial; maintained; 70; degree; 750; final; 950; residence; time; ranges; 20; 150; minutes; remaining; 10; steps; separating; product; fractions; inclusive; fraction; hydrotreating; hydrogenation; recycling; hydrogenated; mixture; coal feed; hydrogen donor; donor solvent; liquefaction zone; residence time; comprises contacting; liquefaction process; coal liquefaction; liquid products; liquid solvent; liquid product; particulate coal; temperature zone; solvent mixture; hydrogenation zone; final zone; produce useful; /208/

Citation Formats

Maa, Peter S. Coal liquefaction process. United States: N. p., 1978. Web.
Maa, Peter S. Coal liquefaction process. United States.
Maa, Peter S. Sun . "Coal liquefaction process". United States. https://www.osti.gov/servlets/purl/863215.
@article{osti_863215,
title = {Coal liquefaction process},
author = {Maa, Peter S.},
abstractNote = {A process for liquefying a particulate coal feed to produce useful petroleum-like liquid products which comprises contacting; in a series of two or more coal liquefaction zones, or stages, graded with respect to temperature, an admixture of a polar compound; or compounds, a hydrogen donor solvent and particulate coal, the total effluent being passed in each instance from a low temperature zone, or stage to the next succeeding higher temperature zone, or stage, of the series. The temperature within the initial zone, or stage, of the series is maintained about 70.degree. F and 750.degree. F and the temperature within the final zone, or stage, is maintained between about 750.degree. F and 950.degree. F. The residence time within the first zone, or stage, ranges, generally, from about 20 to about 150 minutes and residence time within each of the remaining zones, or stages, of the series ranges, generally, from about 10 minutes to about 70 minutes. Further steps of the process include: separating the product from the liquefaction zone into fractions inclusive of a liquid solvent fraction; hydrotreating said liquid solvent fraction in a hydrogenation zone; and recycling the hydrogenated liquid solvent mixture to said coal liquefaction zones.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {1}
}

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