Catalytic removal of hydrogen sulfide from gases

Patent · Tue Feb 19 04:00:00 EST 1980

OSTI ID:5806090

Thompson, R B

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.

• Assignee: Air Resources Inc
• Patent Number(s): US 4189462
• OSTI ID: 5806090
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AMINES
AQUEOUS SOLUTIONS
CARBOHYDRATES
CATALYSTS
CHALCOGENIDES
CHELATES
CHEMICAL REACTIONS
COMPLEXES
DESULFURIZATION
DISPERSIONS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
IRON COMPOUNDS
MIXTURES
ORGANIC COMPOUNDS
PH VALUE
REDOX REACTIONS
REMOVAL
SACCHARIDES
SOLUTIONS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WASTES