Selective oxidation of hydrogen sulfide in the presence of iron-

Details Selective oxidation of hydrogen sulfide in the presence of iron- Selective oxidation of hydrogen sulfide in the presence of iron-

1995-09-05

1997-12-23

Straub, Gary P.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423230, 4235731, 4235768, B01D 5352, B01D 5386

Patent

active

057004404

ABSTRACT:
The present invention discloses a method of selectively oxidizing hydrogen sulfide to elemental sulfur, in which a H.sub.2 S-containing gas mixture contacts with an oxygen-containing gas at 50.degree.-500.degree. C. in the presence of an iron-based catalyst. The reaction product mixture contains substantially no sulfur dioxide. The iron-based catalyst, in addition to iron atom, further contains a promoter of cerium, tin or antimony.

REFERENCES:
patent: 4311680 (1982-01-01), Frech et al.
patent: 4857280 (1989-08-01), Kay et al.
"Gas Purification" by Kohl et al., 4th ed., Gulf Publishing Co., (1985) No Month pp. 420-425 and 718-719.
J.A. Lagas and J. Borsboom, "Selective-oxidation catalyst improves Claus process", Oil and Gas Journal, 86(41), pp. 68-71, (Oct. 10, 1988).
P.F.M.T. van Nisselrooy and J.A. Lagas, "SuperClaus reduces SO.sub.2 emission by the use of a new selective oxidation catalyst", Catalysis Today, 16, pp. 263-271, 1993 No Month.

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