Chemistry of inorganic compounds – Sulfur or compound thereof – Binary compound
Reexamination Certificate
2006-06-13
2009-02-03
Vanoy, Timothy C (Department: 1793)
Chemistry of inorganic compounds
Sulfur or compound thereof
Binary compound
C423S564000, C423S574100, C423S576000
Reexamination Certificate
active
07485281
ABSTRACT:
The reduction of gas streams containing sulfur dioxide to elemental sulfur is carried out by contacting a reducing gas, such as natural gas, methanol or a mixture of hydrogen and carbon monoxide, with recycled sulfur to produce a stream containing hydrogen sulfide that may be reacted with the gas stream that contains sulfur dioxide. Gas streams with a molar concentration of sulfur dioxide from 1 to 100% may be processed to achieve nearly 100% sulfur recovery efficiency.
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Rameshmi, M., et al: “Production of Elemental Sulphur from SO2 (RSR)” World of Metallurgy—Erzmetall, GDMB—Medienvelag, Claustal-Sellerfeld, DE, vol. 59, No. 3, May 2006, pp. 162-167.
Nelson, S. G.: “Elemental Sulfur Production from SO2-Rich Gases” Coal Science & Technology. Proceedings of the 5th International Conferecne on Processing & Utilization of High-Sulfur Coals, Amsterdam, NL, Jan. 1993, pp. 543-554.
Locke Lord Bissell & Liddell LLP
Vanoy Timothy C
Worleyparsons Group, Inc.
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