Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1988-12-08
1990-06-05
Heller, Gregory A.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
423224, 423231, 4235731, 435168, 435264, 435266, 435282, C01B 1716, C01B 3120, C12P 300, C12W 964
Patent
active
049312626
ABSTRACT:
There is disclosed an improved method for the purification of H.sub.2 S containing gases, which comprises the steps of (1) oxidizing a solution of ferrous sulfate into a solution of ferric sulfate with the aid of an iron-oxidizing bacterium; (2) absorbing the H.sub.2 S in the gas by the solution of ferric sulfate by bringing the gas into contact with the solution; (3) separating and recovering the elemental sulfur produced in the solution during the second step; and (4) returning the solution of ferrous sulfate, which is obtained in the third step in an elemental sulfur free state, to the first step to be oxidized again into a solution of ferric sulfate, said method being characterized in that the oxidation in the first step is carried out in a fixed-bed type oxidation vessel which is filled with a bacterium support onto which an iron-oxidizing bacterium has been deposited.
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Shiratori Toshikazu
Sonta Hiromi
Dowa Mining Co. Ltd.
Heller Gregory A.
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