Use of steel plant waste dusts for scavenging hydrogen sulfide

Details Use of steel plant waste dusts for scavenging hydrogen sulfide Use of steel plant waste dusts for scavenging hydrogen sulfide

E - Fixed Constructions

21

B

23/345, 31/8

E21B 43/22 (2006.01) C09K 8/54 (2006.01)

Patent

CA 1145119

Iron rich dusts created during steelmaking, as in the basic oxygen and open hearth processes, are useful for scavenging hydrogen sulfide. For example, basic oxygen furnace dusts, which are in more abundant supply, are found to consist of fine, nearly spherical particles of iron oxide whose crystalline composition comprises Fe3O4 (major portion) and Fe2O3 (minor por- tion) as seen by X-ray diffraction. Their great surface area makes them highly reactive to hydrogen sulfide gas. Their reaction yields unexpected products, namely, free sulfur and iron hydroxides. According to the present invention such iron rich dusts are used in water based drilling muds to scavenge hydrogen sulfide encountered in well drilling.

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