Removal of H/sub 2/S from gas streams
A process for the removal of H/sub 2/S from a sour gaseous stream is described comprising: (a) feeding the sour gaseous stream to a first contacting zone, and intimately contacting the sour gaseous stream in the first contacting zone with an aqueous reactant solution; (b) passing gas-solution mixture from step (a) through enclosed contacting sections in serial flow communication in a second contacting zone; (c) separating the gas having reduced H/sub 2/S content from gas-reactant solution mixture produced in step (b), and recovering a spent reactant solution containing sulfur; (d) removing sulfur from the spent reactant solution containing sulfur; (e) regenerating spent reactant solution from which sulfur has been removed, producing a reactant solution having an increased concentration of ferric chelate of nitrilotriacetic acid; and (f) passing regenerate solution from step (e) to the first contacting zone for use as aqueous reactant solution therein.
- Assignee:
- Shell Oil Co., Houston, TX
- Patent Number(s):
- US 4758416
- OSTI ID:
- 6949567
- Country of Publication:
- United States
- Language:
- English
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54 ENVIRONMENTAL SCIENCES
ACETIC ACID
ACIDIFICATION
AIR POLLUTION CONTROL
AQUEOUS SOLUTIONS
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DESULFURIZATION
DISPERSIONS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
MANAGEMENT
MIXTURES
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
POLLUTION CONTROL
PROCESS SOLUTIONS
PROCESSING
REMOVAL
SEPARATION PROCESSES
SOLUTIONS
SULFIDES
SULFUR COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES