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Title: Method of treating coal to remove sulfur and ash

Abstract

The present invention is directed to an improved method of chemically treating coal to remove sulfur and ash. It is especially adapted for use on high sulfur, refuse coal. In practice the coal is treated with hydrochloric acid and hypochlorous acid in the presence of ferric and ferrous sulfate to convert the iron pyrites to other sulfur compounds. These are then converted to various salts of calcium through neutralization with lime.

Inventors:
Publication Date:
OSTI Identifier:
5620168
Patent Number(s):
US 4305726
Assignee:
IFI; EDB-82-053321
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 21 Dec 1979; Other Information: PAT-APPL-106278
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL FINES; DEASHING; DESULFURIZATION; ACIDIFICATION; ASHES; COAL; HYDROCHLORIC ACID; HYPOCHLOROUS ACID; IRON SULFATES; LIMESTONE; PH VALUE; REMOVAL; SULFUR; CARBONACEOUS MATERIALS; CARBONATE ROCKS; CHEMICAL REACTIONS; ELEMENTS; ENERGY SOURCES; FOSSIL FUELS; FUELS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; IRON COMPOUNDS; MATERIALS; NONMETALS; OXYGEN COMPOUNDS; RESIDUES; ROCKS; SEDIMENTARY ROCKS; SULFATES; SULFUR COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 010402* - Coal, Lignite, & Peat- Purification & Upgrading

Citation Formats

Brown, G E. Method of treating coal to remove sulfur and ash. United States: N. p., 1981. Web.
Brown, G E. Method of treating coal to remove sulfur and ash. United States.
Brown, G E. 1981. "Method of treating coal to remove sulfur and ash". United States.
@article{osti_5620168,
title = {Method of treating coal to remove sulfur and ash},
author = {Brown, G E},
abstractNote = {The present invention is directed to an improved method of chemically treating coal to remove sulfur and ash. It is especially adapted for use on high sulfur, refuse coal. In practice the coal is treated with hydrochloric acid and hypochlorous acid in the presence of ferric and ferrous sulfate to convert the iron pyrites to other sulfur compounds. These are then converted to various salts of calcium through neutralization with lime.},
doi = {},
url = {https://www.osti.gov/biblio/5620168}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 15 00:00:00 EST 1981},
month = {Tue Dec 15 00:00:00 EST 1981}
}