Removing h2s from a sour gaseous stream

Details Removing h2s from a sour gaseous stream Removing h2s from a sour gaseous stream

C - Chemistry, Metallurgy

01

B

C01B 17/05 (2006.01) B01D 53/14 (2006.01) B01D 53/34 (2006.01)

Patent

CA 2048479

T 6067 A B S T R A C T REMOVING H2S FROM A SOUR GASEOUS STREAM Process for the removal of H2S from a sour gaseous stream comprising contacting the sour gaseous stream in a contacting zone with an aqueous reactant solution, which reactant solution comprises Fe(III), Fe(II) and a nitrogenous organic acid chelating agent, under conditions to convert H2S into sulphur, thereby producing a gaseous stream having a reduced H2S content and a reduced aqueous solution containing solid sulphur, Fe(III), Fe(II) and a nitrogenous organic acid chelating agent; treating reduced aqueous solution to produce a sulphur rich stream, regenerated aqueous solution and an aqueous bleed stream; recycling at least part of the regenerated aqueous solution to the contacting zone for use as aqueous reactant solution; and contacting at least part of the bleed stream with a cation exchange resin yielding an aqueous waste stream. C11/T6067FF

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