| 摘要 |
In a catalytic oxidation-reduction process of removing hydrogen sulfide gas from a gaseous fluid stream, the improved step of contacting a gaseous stream containing hydrogen sulfide gas with an aqueous solution containing iron chelate catalyst having iron in the ferric state wherein the iron chelate catalyst comprises at least two iron chelating agents with at least one of said agents being an amine compound selected from the group consisting of polyamino polycarboxylic acids, polyamino alkyl polycarboxylic acids, polyamino hydroxyalkyl polycarboxylic acids, and poly(phosphonoalkyl) amines, and their alkali metal salts and another of said iron chelating agents being selected from the group of polyhydroxy compounds consisting of monosaccharides, disaccharides, reduced monosaccharides, reduced disaccharides, monosaccharide acids, disaccharide acids, and their alkali metal salts; and said solution having a pH ranging between about pH 5.5 and about pH 13.
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