Removal of hydrogen selenide liquids
AssigneeShell Oil Company
InventorDaniel C. Baker
Life of this patent
Estimating the term…
Abstract
Hydrogen selenide is removed from a liquid stream by treatment with a disulfide or polysulfide to oxidize it to elemental selenium.
Claims43
A process for removing hydrogen selenide from a liquid stream which comprises treating the stream with a disulfide or polysulfide to oxidize the selenide to elemental selenium.
A process for the purification of a gas stream containing hydrogen selenide and acidic gases which comprises (1) contacting the gas stream with an aqueous scrubbing solution to remove at least some of the hydrogen selenide;
- (2) contacting the aqueous scrubbing solution with a disulfide or a polysulfide to oxidize the hydrogen selenide to elemental selenium;
- and (3) treating the gas stream from (1) with a liquid sorbent for the absorption of acidic gases.
A process for the purification of a gas stream containing hydrogen selenide and acidic gases which comprises (1) contacting the gas stream with a liquid solvent for the absorption of acidic gases;
- (2) regenerating the loaded solvent to release acidic gases;
- (3) contacting the solvent from step (2) with a disulfide or polysulfide to oxidize the hydrogen selenide to elemental selenium;
- and (4) recycling the lean solvent from step (2) to step (1).
A process for the removal of hydrogen selenide from a gas stream which comprises (1) contacting the gas stream with an aqueous scrubbing solution to remove at least a part of the hydrogen selenide;
- (2) treating the scrubbing solution from step (1) with a disulfide or polysulfide to oxidize the hydrogen selenide to elemental selenium;
- (3) removing the selenium and recycling the aqueous solution to step (1);
- (4) contacting the gas stream from step (1) with a liquid solvent for the absorption of acidic gases and hydrogen selenide;
- (5) regenerating the loaded solvent to release acidic gases;
- (6) treating the lean solvent from step (5) with a disulfide or polysulfide to oxidize the hydrogen selenide to elemental selenium;
- and (7) removing the selenium and recycling the lean solvent to step (4).
Dependencies are inferred from the claim text.