Production of h.sub.2s from so.sub.2 obtained from flue gas

Details Production of h.sub.2s from so.sub.2 obtained from flue gas Production of h.sub.2s from so.sub.2 obtained from flue gas

B - Operations, Transporting

01

D

23/132, 23/349

B01D 53/34 (2006.01) B01D 53/50 (2006.01) B01D 53/60 (2006.01) C01B 17/16 (2006.01)

Patent

CA 1090534

Abstract of the Disclosure This invention is a process for producing gaseous hydrogen sulfide in concentrated form from sulfur dioxide obtained from a dilute gas source by (1) reacting the SO2 with Na2CO3 to form Na2SO3, (2) reducing the Na2SO3 to Na2S, (3) reacting the Na2S with NaHCO3 to form H2S and Na2CO3, (4) recycling part of the Na2CO3 to the SO2 reaction step, (5) reacting the remainder of the Na2CO3 with CO2 and H2O to form NaHCO3 and (6) recycling the NaHCO3 to the H2S formation reaction.

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