Chemistry of inorganic compounds – Sulfur or compound thereof – Elemental sulfur
Reexamination Certificate
2007-06-05
2007-06-05
Vanoy, Timothy C. (Department: 1754)
Chemistry of inorganic compounds
Sulfur or compound thereof
Elemental sulfur
C423S574100, C423S576200, C423S576800, C422S168000, C422S169000, C422S170000, C422S171000, C422S177000
Reexamination Certificate
active
11367077
ABSTRACT:
A compact sulfur recovery system is disclosed which comprises a primary structure including a catalytic partial oxidation reaction zone, a first temperature-control zone, a first Claus catalytic reaction zone, a second temperature-control zone, a first liquid sulfur outlet, and a first effluent gas outlet. In some embodiments, a secondary structure follows the primary structure and comprises a second Claus catalytic reaction zone, a third temperature-control zone, a second liquid sulfur outlet, and a second effluent gas outlet. One or more components of the system employ heat transfer enhancement material in the temperature-control zones, and one or more components deter accumulation of liquid sulfur in the Claus catalytic reaction zones. A process for recovering elemental sulfur from hydrogen sulfide-containing gas streams comprises regulating the temperature of certain components to favor the partial oxidation reaction, and the Claus reaction, as appropriate, and deters pooling of liquid sulfur on the Claus catalyst(s).
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Allison Joe D.
Hatcher Nathan A.
Keller Alfred E.
Kirkendall Kerri J.
Lusk Steven E.
Conley & Rose, P.C.
ConocoPhillips Company
Vanoy Timothy C.
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