Process for the production of sulphur dioxide

Details Process for the production of sulphur dioxide Process for the production of sulphur dioxide

C - Chemistry, Metallurgy

01

B

23/122

C01B 17/52 (2006.01)

Patent

CA 1249415

Abstract In the production of sulphur dioxide by roasting iron pyrites in a fluidized bed reactor, cooling with optionally drying the reaction gases, the improvement which comprises introducing the iron pyrites into the fluidized bed reactor in the form of a suspension of flotation pyrite in sulphuric acid. Advantageously the weight ratio of flotation pyrite to sulphuric acid solution ranges from about 3:1 to 1:1 and contains at least one of a metal sulphate, organic compounds and a carbon-containing fuel, The particle size of the flotation pyrite is less than about 0.1 mm and the sulphuric acid-iron pyrites suspension is introduced into the fluidized bed reactor by blowing with air,

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