Process to produce sulphur from two acid gases, both containing

Details Process to produce sulphur from two acid gases, both containing Process to produce sulphur from two acid gases, both containing

1981-07-15

1983-07-26

Thomas, Earl C.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423237, 423574R, B01D 1704

Patent

active

043953905

ABSTRACT:
A process to produce sulphur from two acid gases both containing hydrogen sulphide and one of which contains ammonia, using a modified Claus technique.
The acid gas containing ammonia is burnt in the presence of air under substoichiometric conditions in a first heat-reaction chamber, while the ammonia-free acid gas is burnt in a second heat-reaction chamber, forming a series with the first chamber, with the right quantity of air to provide a molar ratio of H.sub.2 S to SO.sub.2 of approximately 2/1 at the catalytic reaction stage inlet. The mixed effluents from both heat-reaction chambers may pass through a high-temperature residence chamber before being conveyed to the heat-recovery stage.
Gas effluents from the heat-reaction stage contain H.sub.2 S and SO.sub.2 in the right ratio for the catalytic reaction stage, and no hydrocarbons or harmful quantities of NH.sub.3 and NO.

REFERENCES:
patent: 3957960 (1976-05-01), Palm et al.
patent: 3970743 (1976-07-01), Beavon
patent: 4035158 (1977-07-01), Scott et al.
patent: 4101642 (1978-07-01), Tippmer

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