Method of removing hydrogen sulfide from gases, and for...

Details Method of removing hydrogen sulfide from gases, and for... Method of removing hydrogen sulfide from gases, and for...

C - Chemistry, Metallurgy

01

B

23/332

C01B 17/00 (2006.01) B01D 53/52 (2006.01) C01B 17/04 (2006.01)

Patent

CA 1093281

ABSTRACT OF THE DISCLOSURE The disclosure describes a method of removing hydrogen sulfide from gases, particularly coke-oven gases and for obtain- ing elemental sulfur. Hydrogen sulfide is washed out of the gases in a scrubbing unit which uses a scrubbing solution and is expelled from the scrubbing solution by adding water vapor thereto. The resulting vapours, consisting mainly of hydrogen sulfide are fed to a Claus plant in which most of the hydrogen sulfide is converted into elemental sulfur. The gases leaving the Claus plant are hydrogenated to form hydrogenated waste gases. The latter are cooled to form a condensate and are added to the gas to be purified before reaching the hydrogen sulfide scrubbing unit. This method is less expensive than known methods and provides a thorough environmental protection.

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