Chemistry of inorganic compounds – Sulfur or compound thereof – Elemental sulfur
Patent
1996-09-06
1999-10-12
Starub, Gary P.
Chemistry of inorganic compounds
Sulfur or compound thereof
Elemental sulfur
423574, 4235761, C01B 1720
Patent
active
059651008
ABSTRACT:
A gas stream containing hydrogen sulfide is combusted in a furnace to form a gas having a hydrogen sulfide to sulfur dioxide ratio of at least three to one. The gas is contacted with a conventional Claus catalyst to form elemental sulfur, which is separated and removed. The remaining gas is combined with an oxidizing gas stream and contacted with a special catalyst. The special catalyst has an active ingredient comprising a mixture of metal oxides or a mixed metal oxide, where metal is defined as at least two of the transition metals occurring in the first transition group of the periodic table. The special catalyst preferably has a spinel structure. As an option, a portion of the acid gas feed can be bypassed a point before the final reactor to ensure that the gas going to the final reactor promotes the desired catalytic action. The special catalyst oxidizes both COS and CS.sub.2 to CO.sub.2 and SO.sub.2, and converts H.sub.2 S and SO.sub.2 to elemental sulfur and water. The process converts a greater percentage of hydrogen sulfide to elemental sulfur than the Claus process, and also gives greater overall sulfur recovery.
REFERENCES:
patent: 2919976 (1960-01-01), Feagen, Jr.
patent: 4147763 (1979-04-01), McKinzie et al.
patent: 4818740 (1989-04-01), Berben et al.
patent: 4886649 (1989-12-01), Ismagilov et al.
patent: 4937058 (1990-06-01), Dupin et al.
patent: 4988494 (1991-01-01), Lagas et al.
patent: 5028409 (1991-07-01), Gitman
patent: 5294428 (1994-03-01), Watson
patent: 5352422 (1994-10-01), Van den Brink et al.
Khanmamedov, Kalinkin, Kundo, and Novopashina; "XPS Studies Of Active Surface of Al-Cu-Cr Catalysts For Oxidation Of Tail Gases From Sulfur Production"; React. Kinet. Catal. Lett., vol. 37, No. 11, pp. 83-88; 1988; Budapest, Hungary.
Khanmamedov, Gulmaliev, Sharipov, and Ledyaev; "Catalytic Incineration of Tail Gases of Claus Sulfur Plants"; Gasovaya Promyshlennost, No. 3, p. 38; 1886; Moscow, USSR.
Khanmamedov, Sharipov, Gulmaliev, and Chemezov; "Semi-Commercial Test of the Catalytic Incineration of Tail Gases of Clause Plants"; Gasovaya Promyshlennost, No. 12, pp. 42-43; 1886; Moscow, USSR.
Hubbard Jeffrey T.
Kelly H. Dennis
Starub Gary P.
LandOfFree
Process for recovery of sulfur from an acid gas stream does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for recovery of sulfur from an acid gas stream, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for recovery of sulfur from an acid gas stream will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-649256