Chemistry of inorganic compounds – Sulfur or compound thereof – Elemental sulfur
Patent
1996-07-26
1999-11-23
Straub, Gary P.
Chemistry of inorganic compounds
Sulfur or compound thereof
Elemental sulfur
423220, 423224, 4235766, 4235767, 4235768, 423DIG17, 435168, 435266, B01D 5352, C01B 1705
Patent
active
059895136
ABSTRACT:
A process for biologically enhancing an iron-based redox process for catalytic oxidation of a sulfide compound such as hydrogen sulfide from a gas in a redox system wherein said catalyst comprises a ferric compound and at least one organic chelant capable of holding ferric and ferrous ions in solution at processing temperatures and conditions suitable for generation and retrieval of elemental sulfur, comprising the steps of oxidation of a sulfide compound by a gas with a redox system comprising ferric ions, removal of elemental sulfur from said system, and reoxidation of ferrous ions in the redox system in the presence of a culture of bacteria comprising Thiobacillus ferrooxidans and leptospirillium ferrooxidans at a pH at least as high as about 7.5.
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Gas Research Institute
Straub Gary P.
Vanoy Timothy C
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