Process for the recovery of sulfur from Claus tail gas streams

Details Process for the recovery of sulfur from Claus tail gas streams Process for the recovery of sulfur from Claus tail gas streams

2007-12-25

2007-12-25

Vanoy, Timothy C. (Department: 1754)

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

C423S576200, C423S576800, C423S244010, C423S244020, C423S244030, C423S244040, C423S244090, C423S244100, C423S244110, C423S539000, C423S542000

Reexamination Certificate

active

11076192

ABSTRACT:
Recovering sulfur from a gas stream containing hydrogen sulfide by oxidizing the gas stream to convert the hydrogen sulfide in the gas stream to sulfur oxide, and thus form a sulfur oxide enriched gas stream. The sulfur oxide enriched gas stream is contacted with a solid, sulfation resistant adsorbent bed at relatively low temperatures to extract the sulfur oxides and retain them as sulfur compounds, thus forming a sulfur oxide depleted gas stream. The adsorbent bed is then contacted with an inert or reducing gas stream to reduce the retained sulfur compounds to sulfur and/or sulfur dioxide and thereby form an enriched sulfur and/or sulfur dioxide bearing stream. The elemental sulfur is recovered and/or the sulfur dioxide bearing stream may be recycled to the Claus unit for further conversion.

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