Process for the removal of hydrogen sulfide, by means of its...

Details Process for the removal of hydrogen sulfide, by means of its... Process for the removal of hydrogen sulfide, by means of its...

2005-01-20

2009-06-30

Vanoy, Timothy C (Department: 1793)

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

C423S576400, C423S576500, C048S127300, C048S127500, C048S127700

Reexamination Certificate

active

07553473

ABSTRACT:
Hydrogen sulfide is oxidized to sulfur by means of treatment with an aqueous acid solution containing trivalent iron and a hetero polyacid having formula (I): HnXVyM(12-y)O40; or a sole hetero polyacid having formula (II): HnMeM12O40; wherein the symbols X, M Me n and y are specified in the text. At the end of the oxidation, the solution is treated with gas containing oxygen to re-oxidize the reduced metal.

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Gary Nagl, “Controlling Hydrogen Sulphide Emissions”, The British Sulphur Co., No. 250, XP 000692274, pp. 45-47, 49, 51, 1997.

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