METHOD OF SULFUR PRODUCING Russian patent published in 1994 - IPC

FIELD: chemical technology. SUBSTANCE: hydrogen sulfide-containing gases are subjected for thermal oxidation at 1000-1300 C, gas is cooled up to 150-300 C, and condensate of sulfur formed is isolated. After cooling gas is fed to the stage of catalytic interaction of prepared NH₃ with SO₂ in the presence of homogeneous catalyst in the liquid phase in the medium of aqueous solution of phosphates and ammonium thiosulfate. Solution of aluminium and/or silicon oxides or hydroxides in hydrofluoric acid at concentration H₂S is used as a catalyst. HCN feeding to the solution at ratio 1·10^-3 - 2·10^-1 mole/l = 2-5 converts to the nontoxic compound S^°/CN^- =2 - 5. Method is used for reprocessing of hydrogen sulfide-containing gases, preparing of elemental sulfur mainly in the processes of hydrogen sulfide treatment in coke oven composition and containing impurities of HCN and NH₄CNS. EFFECT: simplified method of sulfur producing. 2 cl, 3 dwg, 1 tbl