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Oxidative removal of hydrogen sulfide from gaseous streams

Patent ·
OSTI ID:5863565
;

Hydrogen sulfide is removed from a gaseous stream by contacting the stream with an aqueous solution of ferric ion chelated with an aminopolycarboxylic acid at a Ph of 3.5 to 5, whereby hydrogen sulfide is oxidized to elemental sulfur and chelated ferric ion is reduced to chelated ferrous ion. The solution also contains ammonia or an aliphatic, alicyclic, or heterocyclic primary or secondary amine in a sufficient proportion to maintain chelated ferrous ion in solution at a ph of 3.5 to 5. The chelated ferric ion is regenerated by contacting the solution with a gas containing elemental oxygen.

Assignee:
California, University Of Regents
Patent Number(s):
US 4278646
OSTI ID:
5863565
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
02 PETROLEUM
020800 -- Petroleum-- Waste Management
03 NATURAL GAS
030700 -- Natural Gas-- Waste Management
AIR POLLUTION CONTROL
AMMONIA
CARBOXYLIC ACIDS
CATALYSTS
CHALCOGENIDES
CHELATES
CHEMICAL REACTIONS
COMPLEXES
CONTROL
DESULFURIZATION
ELEMENTS
GASEOUS WASTES
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
IRON COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN
POLLUTION CONTROL
REMOVAL
SULFIDES
SULFUR COMPOUNDS
THIOLS
TRANSITION ELEMENT COMPOUNDS
WASTES