Chemistry of inorganic compounds – Sulfur or compound thereof – Elemental sulfur
Reexamination Certificate
2008-04-08
2008-04-08
Vanoy, Timothy C. (Department: 1793)
Chemistry of inorganic compounds
Sulfur or compound thereof
Elemental sulfur
C423S576800, C423S245300
Reexamination Certificate
active
10505621
ABSTRACT:
A method of conducting the partial oxidation to sulphur in at least one furnace of part of the hydrogen sulphide content of a feed gas mixture containing from 10 to 60% by volume of hydrogen sulphide but including at least one aromatic hydrocarbon impurity typically selected from benzene, xylene, toluene and ethyl benzene. A flame is created in the furnace. All the feed gas mixture is fed to the flame. Oxygen molecules are also fed to the flame. At last some of the oxygen molecules are supplied from a source of oxygen-enriched air to pure oxygen, and there is created in the flame at least one hot aromatic hydrocarbon impurity destruction region in which a substantial proportion, typically at least 75% by volume, of the aromatic hydrocarbon impurity is destroyed.
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patent: 6495117 (2002-12-01), Lynn
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Graville Stephen Rhys
Norman Jason Scott
Neida Philip H. Von
The BOC Group, plc.
Vanoy Timothy C.
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