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Title: Liquefaction of calcium-containing subbituminous coals and coals of lower rank

Abstract

An improved process for the treatment of a calcium-containing subbituminous coal and coals of lower rank to form insoluble, thermally stable calcium salts which remain within the solids portions of the residue on liquefaction of the coal, thereby suppressing the formation of scale, made up largely of calcium carbonate which normally forms within the coal liquefaction reactor (i.e., coal liquefaction zone), e.g., on reactor surfaces, lines, auxiliary equipment and the like. An oxide of sulfur, in liquid phase, is contacted with a coal feed sufficient to impregnate the pores of the coal. The impregnated coal, in particulate form, can thereafter be liquefied in a coal liquefaction reactor (reaction zone) at coal liquefaction conditions without significant formation of scale.

Inventors:
 [1]
  1. Baytown, TX
Publication Date:
OSTI Identifier:
863384
Patent Number(s):
US 4161440
Assignee:
Exxon Research & Engineering Co. (Florham Park, NJ)
DOE Contract Number:  
E(49-18)-2353
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
liquefaction; calcium-containing; subbituminous; coals; rank; improved; process; treatment; coal; form; insoluble; thermally; stable; calcium; salts; remain; solids; portions; residue; suppressing; formation; scale; carbonate; normally; forms; reactor; zone; surfaces; lines; auxiliary; equipment; oxide; sulfur; liquid; phase; contacted; feed; sufficient; impregnate; pores; impregnated; particulate; thereafter; liquefied; reaction; conditions; significant; calcium salts; auxiliary equipment; coal feed; liquefaction zone; improved process; coal liquefaction; liquid phase; reaction zone; calcium carbonate; particulate form; thermally stable; liquefaction reactor; subbituminous coals; stable calcium; subbituminous coal; reactor surfaces; calcium-containing subbituminous; form insoluble; liquefaction conditions; bituminous coal; bituminous coals; /208/44/

Citation Formats

Brunson, Roy J. Liquefaction of calcium-containing subbituminous coals and coals of lower rank. United States: N. p., 1979. Web.
Brunson, Roy J. Liquefaction of calcium-containing subbituminous coals and coals of lower rank. United States.
Brunson, Roy J. Mon . "Liquefaction of calcium-containing subbituminous coals and coals of lower rank". United States. https://www.osti.gov/servlets/purl/863384.
@article{osti_863384,
title = {Liquefaction of calcium-containing subbituminous coals and coals of lower rank},
author = {Brunson, Roy J},
abstractNote = {An improved process for the treatment of a calcium-containing subbituminous coal and coals of lower rank to form insoluble, thermally stable calcium salts which remain within the solids portions of the residue on liquefaction of the coal, thereby suppressing the formation of scale, made up largely of calcium carbonate which normally forms within the coal liquefaction reactor (i.e., coal liquefaction zone), e.g., on reactor surfaces, lines, auxiliary equipment and the like. An oxide of sulfur, in liquid phase, is contacted with a coal feed sufficient to impregnate the pores of the coal. The impregnated coal, in particulate form, can thereafter be liquefied in a coal liquefaction reactor (reaction zone) at coal liquefaction conditions without significant formation of scale.},
doi = {},
url = {https://www.osti.gov/biblio/863384}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {1}
}

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