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Title: Method of treating coal to remove sulfur and ash

Patent ·
OSTI ID:5620168

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.

Assignee:
IFI; EDB-82-053321
Patent Number(s):
US 4305726
OSTI ID:
5620168
Resource Relation:
Patent File Date: Filed date 21 Dec 1979; Other Information: PAT-APPL-106278
Country of Publication:
United States
Language:
English

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Related Subjects

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