Process for the removal of H/sub 2/S from fluid streams using a water soluble polymeric chelate of an oxidizing polyvalent metal
Patent
·
OSTI ID:6240716
A cyclic process is described for the removal of H/sub 2/S from a gas stream comprising H/sub 2/S, which process comprises: contacting the gas stream in a contacting zone with an aqueous reaction solution at between about 10/sup 0/ and 90/sup 0/C for a time sufficient to oxidize S/sup =/ to elemental sulfur the reaction solution itself consisting of an amount of water-soluble organic polymeric chelate effective to oxidize the S identical to elemental sulfur containing an oxidizing polyvalent metal selected from an organic polymeric chelate having a molecular weight of between about 1,000 and 500,000 daltons; separating the gas stream and the resulting aqueous phase containing sulfur and polymeric chelated-metal complex; separating the sulfur from the aqueous phase; treating the aqueous solution by membrane separation to remove water ad other monomeric reaction products present having a molecular weight of less than 500 daltons from the aqueous solution; contacting the concentrated aqueous solution with an oxidizing agent under reaction conditions effective to oxidize the polyvalent metal in chelate form; and recycling the concentrated aqueous solutions to the contacting zone.
- Assignee:
- Dow Chemical Co., Midland, MI
- Patent Number(s):
- US 4808385
- OSTI ID:
- 6240716
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020800* -- Petroleum-- Waste Management
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHELATES
CHEMICAL REACTIONS
COMPLEXES
CONTROL
DESULFURIZATION
DISPERSIONS
ELEMENTS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
MEDIUM TEMPERATURE
METALS
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDATION
POLLUTION CONTROL
POLYMERS
REMOVAL
SEPARATION PROCESSES
SOLUTIONS
SULFIDES
SULFUR
SULFUR COMPOUNDS
WASTES
020800* -- Petroleum-- Waste Management
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHELATES
CHEMICAL REACTIONS
COMPLEXES
CONTROL
DESULFURIZATION
DISPERSIONS
ELEMENTS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
MEDIUM TEMPERATURE
METALS
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDATION
POLLUTION CONTROL
POLYMERS
REMOVAL
SEPARATION PROCESSES
SOLUTIONS
SULFIDES
SULFUR
SULFUR COMPOUNDS
WASTES