Chemistry of inorganic compounds – Sulfur or compound thereof – Elemental sulfur
Reexamination Certificate
2006-06-27
2006-06-27
Silverman, Stanley S. (Department: 1754)
Chemistry of inorganic compounds
Sulfur or compound thereof
Elemental sulfur
C423S220000, C423S237000, C423S576800
Reexamination Certificate
active
07067101
ABSTRACT:
The thermal combustion step of the modified Claus process is carried out in a water-wall boiler instead of a refractory-lined reaction furnace. The water-wall boiler replaces the conventional refractory-lined furnace and waste heat boiler when air, oxygen, or oxygen-enriched air is used as the oxidant. The acid gas combustion may be hydrogen sulfide-rich or hydrogen sulfide-lean with or without contaminants such as hydrocarbons and ammonia. Thermal combustion is performed in a single stage, without a recycle, for all levels of oxygen enrichment.
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Hertzog Ardith E.
Silverman Stanley S.
WorleyParsons Group Inc.
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