Sulfur removal process
AssigneeShell Oil Company
InventorsHoward L. Fong, David A. Van Kleeck
Life of this patent
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Abstract
Froth or foam sulfur particle accumulation during the recovery of sulfur particles from a zone containing regenerated redox solution is reduced by agitating and removing the sulfur slurry in a plurality of streams, including at least one stream at a short distance from the top of the solution in the zone and at least one stream from the bottom of the zone and optionally recombining the streams after removal.
Claims23
A process comprising removing sulfur particles from an aqueous polyvalent metal ion or polyvalent metal chelate solution by a method of sinking said particles in a zone, when at least some of the sulfur particles fail to sink to the bottom of the zone for recovery, agitating the sulfur particles suspended as a froth or foam and removing sulfur particles in a plurality of streams including at least one stream at a short distance from the top of the solution in the zone and at least one stream from the bottom of the solution in the zone, and optionally recombining the streams after removal.
A process comprising:
- removing sulfur particles by a method of sinking sulfur particles from an aqueous polyvalent metal ion or polyvalent metal chelate sulfur redox solution, used to remove hydrogen sulfide from a gas stream and prepare sulfur, by (1) removing sinking sulfur slurry from a stream at the bottom of a redox solution in a zone;
- (2) when sulfur particles fail to sink to the bottom of the zone for recovery, agitating the sulfur particles suspended as a froth or foam and removing sulfur particles in a plurality of streams including at least one stream at a short distance from the top of the solution in the zone and at least one stream from the bottom of the solution in the zone;
- and (3) optionally recombining the streams after removal.
A process comprising reducing the froth or sulfur accumulation during the recovery an aqueous polyvalent metal ion or polyvalent metal chelate redox solution used to remove hydrogen sulfide from sulfur from the bottom of a gas stream by (1) removing the sinking sulfur slurry from a zone containing the regenerated redox solution;
- (2) when all the sulfur particles fail to sink, agitating the sulfur particles suspended as a froth or foam and removing sulfur particles in a plurality of streams, including at least one stream at a short distance from the top of the solution in the zone, and at least one stream from the bottom of the zone;
- and (3) optionally recombining the streams after removal.
A process for the removal of hydrogen sulfide from a sour gas stream which comprises:
- (1) contacting the gas stream with an aqueous polyvalent metal ion or polyvalent metal chelate redox solution below the melting point of sulfur to produce a sweet gas stream and a reduced solution;
- (2) removing the reduced solution from the contacting zone, optionally in a plurality of streams;
- (3) regenerating the combined streams of solution to produce an admixture of regenerated solution and sulfur;
- (4) removing the sinking sulfur from the bottom of the separator zone;
- (5) when sulfur particles fail to sink agitating the sulfur particles suspended as a froth or foam and removing sulfur particle slurry from the separation zone in a plurality of streams, including at least one stream at a short distance from the top of the gas-liquid interface in the zone and at least one stream from the bottom of the zone;
- and (6) optionally recombining the streams after removal
Dependencies are inferred from the claim text.