Cataban
Cataban : A process for removing small amounts of hydrogen sulfide from industrial gas streams by oxidation, in aqueous solution, to elemental sulfur. The oxidant is the ferric ion, 2nd. Suppl. Vol., in a proprietary chelated form. The solution is regenerated by atmospheric oxygen. The overall reactions are: 2Fe3+ + H2S + 2Fe2+ + 2H+ + S and 2Fe2+ + 1/2O2 + 2H+ + 2Fe3+ + H2O. (Check source for accuracy of chemical formula)