Process of decreasing the sulfur content of exhaust gases obtained during the recovery of sulfur

Patent · Tue Sep 20 04:00:00 EDT 1983

OSTI ID:5548876

Schlauer, J; Fischer, H; Kriebel, M

In a process of decreasing the sulfur content of exhaust gases obtained during the recovery of sulfur from acid gases containing H/sub 2/S and other S-containing compounds in the Claus process, the acid gases which contain H/sub 2/S and other S-containing compounds are reacted in a Claus plant to form elemental sulfur. A gas which contains H/sub 2/S or SO/sub 2/ is subsequently added at a controlled rate to maintain a stoichiometric ratio of 2:1 of H/sub 2/S to SO/sub 2/ in the tail gas from the Claus plant. The gas which contains H/sub 2/S or SO/sub 2/ may be added to the tail gas from the Claus plant or before the last contacting stage of a multistage Claus plant. During the addition of a gas which contains H /sup 2/S the Claus plant can be operated at an H/sub 2/S to SO/sub 2/ ratio of or below 2:1. During the addition gas which contains SO/sub 2/ the Claus plant can be operated at an H/sub 2/S to SO/sub 2/ ratio of or above 2:1. The H/sub 2/ and SO/sub 2/ contained in the tail gas are chemically reacted to form elementary sulfur in a tail gas-desulfurizing plant and the sulfur is withdrawn.

• Assignee: Metallgesellschaft Aktiengesellschaft (Germany, Federal Republic Of)
• Patent Number(s): US 4405593
• OSTI ID: 5548876
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CHALCOGENIDES
CHEMICAL REACTIONS
CLAUS PROCESS
DESULFURIZATION
ELEMENTS
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RECOVERY
SULFIDES
SULFUR
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES