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Pyrite Is React With Hcl

Finely divided coal or coal derivatives, containing pyrite, are reacted with sulfurous acid the oxidizing agent if desired, hcl may also be used to improve the reaction efficiency to remove pyritic sulfur from coal as shown by the following equations primary oxidation - reduction 4 fes2 pyrite 3so2 12 hcl - 4 fecl3 11s 6 h2o secondary oxidation - reduction 4 fecl3 fes2.

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