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

1978-11-27

1981-01-20

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423231, 423562, 423632, 423573G, 252 85B, 252 855B, 175 64, 75 25, B01D 5334, C09K 704

Patent

active

042462436

ABSTRACT:
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 Fe.sub.3 O.sub.4 (major portion) and Fe.sub.2 O.sub.3 (minor portion) 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 slurries through which sour hydrocarbon gas is bubbled, and in water based drilling muds to scavenge hydrogen sulfide encountered in well drilling.

REFERENCES:
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patent: 1734307 (1929-11-01), Sperr, Jr.
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patent: 4025604 (1977-05-01), Morlguchi et al.
Milbourne, "The Removal of Hydrogen Sulfide From Gas By Means of Iron Oxide With Special Reference to Humidity Conditions", John Hopkins University, 1930, pp. 9 & 10.

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