A catalytic composition for oxidation-reduction process for effecting the catalytic oxidation of hydrogen sulfide in gas streams

Abstract From the Canadian patent

There is provided a method for preparing a catalytic composition for effecting the catalytic oxidation of hydrogen sulfide in gas streams. The method comprises the steps of: a) preparing a mixture of a water soluble iron compound and a stabilizing agent in an aqueous system at a pH of less than , or equal to 2; b) adding a mixture of two chelating agents I and II wherein , both , chelating agents are amine chelating agents to the mixture obtained; c) adding sufficient aqueous amine chelating agent II to the mixture obtained to adjust the pH to 7 to 10; and d) heating the mixture obtained to obtain the desired concentration of chelated iron in the mixture.