Process for removing H/sub 2/S from sour gases with generation of a claus feed gas
Patent
·
OSTI ID:6002055
Sour industrial gases containing carbon dioxide and hydrogen sulfide are treated with amines to remove the CO/sub 2/ and H/sub 2/S. The amine absorbent containing or loaded with H/sub 2/S and CO/sub 2/ is regenerated and the off-gas containing concentrated amounts of H/sub 2/S and CO/sub 2/ is treated in a second amine absorber to produce an amine absorbent loaded with H/sub 2/S. This amine is then regenerated to provide an off-gas containing a high ratio of H/sub 2/S to CO/sub 2/ which makes it suitable for use as the feed gas to a sulfur recovery unit such as a claus plant. The process is automatically controlled so that the concentration of H/sub 2/S in the second amine absorber is built up to and controlled at a desired set point so that the off-gas has the required H/sub 2/S/CO/sub 2/ ratio.
- Assignee:
- Dow Chemical Co
- Patent Number(s):
- US 4289738
- OSTI ID:
- 6002055
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
ADSORBENTS
ADSORPTION
AIR POLLUTION CONTROL
ALCOHOLS
AMINES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CLAUS PROCESS
CONTROL
CONTROL EQUIPMENT
DESULFURIZATION
EQUIPMENT
FLUIDS
GASES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROXY COMPOUNDS
OFF-GAS SYSTEMS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
RECYCLING
REGENERATION
REMOVAL
SORPTION
SORPTIVE PROPERTIES
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
010800* -- Coal
Lignite
& Peat-- Waste Management
ADSORBENTS
ADSORPTION
AIR POLLUTION CONTROL
ALCOHOLS
AMINES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CLAUS PROCESS
CONTROL
CONTROL EQUIPMENT
DESULFURIZATION
EQUIPMENT
FLUIDS
GASES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROXY COMPOUNDS
OFF-GAS SYSTEMS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
RECYCLING
REGENERATION
REMOVAL
SORPTION
SORPTIVE PROPERTIES
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES