Method for removing hydrogen sulfide from gas streams

Details Method for removing hydrogen sulfide from gas streams Method for removing hydrogen sulfide from gas streams

1984-07-17

1985-08-27

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423226, 423228, 423232, 423573R, 252189, 252192, B01D 5334, C01B 1705

Patent

active

045377529

ABSTRACT:
For the simultaneous absorption and oxidation of hydrogen sulfide, gaseous mixtures substantially free of molecular oxygen are scrubbed in a first stage with an aqueous, alkaline scrubbing agent containing pentavalent vanadium as the oxidizing medium. The hydrogen sulfide is absorbed by the scrubbing agent and oxidized to elemental sulfur with reduction of pentavalent vanadium to tetravalent vanadium. The thus-reduced scrubbing agent is then regenerated in a separate second stage in the presence of an amine promoter by reoxidation of the tetravalent vanadium with molecular oxygen, and reused.

REFERENCES:
patent: 4036942 (1977-07-01), Sibeud et al.
patent: 4283379 (1981-08-01), Fenton et al.
patent: 4374104 (1983-02-01), Primach

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