Sulfur removal from coal
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United States of America Patent
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-
Jan 1, 1985
Grant Date -
N/A
app pub date -
Aug 29, 1983
filing date -
Aug 29, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Coal is treated to remove both pyritic and organic sulfur by contacting with an aqueous solution comprising cupric ions at temperatures of about 140.degree. C.-200.degree. C. under autogenic pressure, until substantial amounts of the sulfur are solubilized, separating the coal solids, and washing the solids with water to remove soluble forms of sulfur, iron and copper therefrom. The copper can be recovered and recycled as a cupric salt.
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