Coal desulfurization process

Details Coal desulfurization process Coal desulfurization process

C - Chemistry, Metallurgy

10

L

196/11

C10L 9/02 (2006.01)

Patent

CA 1043724

ABSTRACT OF THE DISCLOSURE Coal is dessulfurized by heating it in comminuted form in the presence of NO2 and other gases to remove part of the sul- fur in the coal. Sulfur still remaining in the coal will be in the form of an inorganic sulfate or sulfite or included in an organic radical, assuming coal has a condensed aromatic ring structure, with two double bonded oxygen atoms attached. This sulfur is for the most part removed by a subsequent additional step of exposing the pre-treated coal to water or to a heated alkali metal hydroxide solution.

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