Method of treating coal to remove sulphur and ash

Details Method of treating coal to remove sulphur and ash Method of treating coal to remove sulphur and ash

C - Chemistry, Metallurgy

10

L

196/11

C10L 9/02 (2006.01)

Patent

CA 1140880

METHOD OF TREATING COAL TO REMOVE SULFUR AND ASH Abstract of the Disclosure 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 hypo- chlorous 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.

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