Process for desulfurizing Claus tail-gas

Patent · Tue Jul 20 04:00:00 EDT 1993

OSTI ID:6184542

Buchanan, J S; Stern, D L; Sodomin, J F; Teman, G J

In a process where a solid absorbent is used to remove sulfur oxides wherein said absorbent is regenerated with a reducing gas and off gas is passed to a Claus sulfur recovery process, the improvement is described comprising: (a) introducing an oxygen containing gas and a tail-gas into an incinerator under conditions sufficient to convert substantially all of the sulfur therein to sulfur oxides; (b) directing gas with sulfur oxides therein from the incinerator into an absorber operated so that substantially all of the sulfur oxides are absorbed on a solid absorber; (c) allowing sufficient time for a desired amount of sulfur oxides to be absorbed on said solid absorber; (d) ceasing absorption of sulfur oxides on said absorber; (e) regenerating the solid absorbent by contacting it with a hydrocarbon or hydrogen reducing gas under conditions sufficient to cause the absorbed sulfur oxides to be released, thereby forming a sulfur dioxide and hydrogen sulfide off gas and a regenerated solid absorbent whereby sulfur dioxide and hydrogen sulfide contained in the off gas is in an amount sufficient to be removed by a Claus sulfur recovery process; and (f) directing the off gas into a Claus sulfur recovery process where this gas is converted to elemental sulfur.

• Assignee: Mobil Oil Corp., Fairfax, VA (United States)
• Patent Number(s): US 5229091; A
• Application Number: PPN: US 7-868432
• OSTI ID: 6184542
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ADSORBENTS
ADSORPTION
CHALCOGENIDES
CHEMICAL REACTIONS
CLAUS PROCESS
DESULFURIZATION
ELEMENTS
ENRICHMENT
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INCINERATORS
MANAGEMENT
MATERIALS RECOVERY
NONMETALS
OXIDES
OXYGEN COMPOUNDS
OXYGEN ENRICHMENT
PROCESSING
REDUCTION
REGENERATION
SORPTION
SULFIDES
SULFUR
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES