Process and apparatus for recovery of sulfur from ammonia containing acid gas streams

Patent · Mon Feb 16 23:00:00 EST 1987

OSTI ID:7068098

Palm, J W

This patent describes a Claus process for the recovery of sulfur, the steps comprising: passing a first stream containing hydrogen sulfide, sulfur dioxide, and ammonia through a low temperature Claus catalytic conversion zone and depositing elemental sulfur and ammonium compounds on catalyst therein; deriving a regeneration stream from the Claus process and regenerating the resulting laden catalyst therewith vaporizing sulfur and ammonia therefrom and producing a regeneration effluent stream comprising elemental sulfur and ammonia; cooling the regeneration effluent stream and condensing elemental sulfur therefrom and producing a sulfur lean regeneration effluent stream; introducing at least a portion of the sulfur lean regeneration effluent stream into a hydrogenation zone and converting substantially all sulfur compounds therein to hydrogen sulfide. The resulting hydrogen sulfide containing stream is introduced into an ammonia removal zone. The resulting stream is contacted with a first aqueous stream and produces a second aqueous stream enriched in ammonia and a sulfur lean regeneration effluent stream reduced in ammonia content; removing ammonia from the second aqueous stream and producing an ammonia enriched stream; returning the sulfur lean regeneration effluent stream reduced in ammonia content to the Claus process adjacent and downstream of the point of derivation of the regeneration stream for the further recovery of sulfur therefrom; and introducing the ammonia enriched stream into an ammonia conversion zone and reducing the concentration of ammonia therein.

• Assignee: Amoco Corp., Chicago, IL
• Patent Number(s): US 4643888
• OSTI ID: 7068098
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AMMONIA
AMMONIUM COMPOUNDS
AQUEOUS SOLUTIONS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
CLAUS PROCESS
DESULFURIZATION
DISPERSIONS
ELEMENTS
EVAPORATION
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROGENATION
MIXTURES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
QUANTITY RATIO
REGENERATION
REMOVAL
SOLUTIONS
SULFIDES
SULFUR
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES