Removal of H.sub.2 S from gaseous streams
AssigneeShell Oil Company
InventorDonald C. Olson
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Abstract
A process for the removal of hydrogen sulfide from a variety of gas streams is disclosed. The gas stream containing the sour gases is contacted with a reactant solution comprising iron (Fe III) lignosulfonate. The hydrogen sulfide is converted to sulfur, and the reactant is reduced. The process may be cyclic, and may include sulfur removal and regeneration of the reactant.
Claims11
A process for the removal of H.sub.2 S from a sour gaseous stream comprising contacting the sour gaseous stream, under conditions to convert H.sub.2 S, in a contacting zone with an aqueous reaction solution comprising an effective amount of iron(III) lignosulfonate, and producing a sweet gas stream and an aqueous solution containing sulfur and iron(II) lignosulfonate.
A process for the removal of H.sub.2 S from a sour gaseous stream comprising
- (a) contacting the sour gaseous stream, under conditions to convert H.sub.2 S, in a contacting zone with an aqueous reaction solution comprising an effective amount of Fe(III) lignosulfonate, producing a sweet gas stream, and sulfur and Fe(II) lignosulfonate in an aqueous mixture;
- (b) removing sulfur from the aqueous mixture;
- (c) regenerating aqueous mixture from step (b) in a regenerating zone, producing Fe(III) lignosulfonate in a regenerated solution;
- and
- (d) returning regenerated solution from step (c) to the contacting zone for use as the aqueous reaction solution therein.
A process for the removal of H.sub.2 S from a sour gaseous stream comprising
- (a) contacting the sour gaseous stream, under conditions to convert H.sub.2 S, in a contacting zone with an aqueous reaction solution comprising an effective amount of Fe(III) lignosulfonate, producing a sweet gas stream, and sulfur and Fe(II) lignosulfonate in an aqueous mixture;
- (b) regenerating aqueous mixture from step (a) in a regenerating zone, producing Fe(III) lignosulfonate in a regenerated solution;
- (c) removing sulfur from the regenerated solution;
- and
- (d) returning regenerated solution from step (c) to the contacting zone for use as the aqueous reaction solution therein.
A process for the removal of H.sub.2 S from a sour gaseous stream comprising
- (a) contacting the sour gaseous stream, under conditions to convert H.sub.2 S, in a contacting zone with an aqueous reaction solution at a temperature below the melting point of sulfur, the solution comprising an effective amount of Fe(III) lignosulfonate, producing a sweet gas stream, and solid sulfur and Fe(II) lignosulfonate in an aqueous mixture;
- (b) removing solid sulfur from the aqueous mixture;
- (c) regenerating aqueous mixture from step (b) in a regenerating zone, producing Fe(III) lignosulfonate in a regenerated solution;
- and
- (d) returning regenerated solution from step (c) to the contacting zone for use as the aqueous reaction solution therein.
A process for the removal of H.sub.2 S from a sour gaseous stream comprising
- (a) contacting the sour gaseous stream, under conditions to convert H.sub.2 S, in a contacting zone with an aqueous reaction solution at a temperature below the melting point of sulfur, the solution comprising an effective amount of Fe(III) lignosulfonate, producing a sweet gas stream, and solid sulfur and Fe(II) lignosulfonate in an aqueous mixture;
- (b) regenerating aqueous mixture from step (a) in a regenerating zone, producing Fe(III) lignosulfonate in a regenerated solution;
- (c) removing solid sulfur from the regenerated solution;
- and
- (d) returning regenerated solution from step (c) to the contacting zone for use as the aqueous reaction solution therein.
Dependencies are inferred from the claim text.