Process of removing hydrogen sulphide from a gas mixture

Details Process of removing hydrogen sulphide from a gas mixture Process of removing hydrogen sulphide from a gas mixture

C - Chemistry, Metallurgy

01

B

C01B 17/05 (2006.01) B01D 53/52 (2006.01)

Patent

CA 2100294

Removing hydrogen sulphide from a gas (3) comprising contacting the gas (3) in a contactor (1) with an aqueous reactant solution (6) including a coordination complex of Fe(III) with a chelating agent to produce a purified gas (7) and spent aqueous solution (9) containing solid sulphur and having an increased content of coordi- nation complex of Fe(II) with the chelating agent, and regenerating the spent aqueous reactant solution (9) by contacting in a first contact vessel (10) the spent aqueous reactant solution (9) co- currently with air (13) to produce partly regenerated aqueous reactant solution (15) followed by contacting in a second contact vessel (18) partly regenerated aqueous reactant solution (15) counter-currently with air (21) to produce regenerated aqueous reactant solution (24) which is removed from the lower part of the second contact vessel (18).

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