Scavenging of hydrogen sulphide
AssigneesWilliam Blythe Limited, Blacksmith Chemical Services
InventorsNorman Bridge, Robert McGowan
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Abstract
A method for the removal of hydrogen sulphide from a hydrocarbon-water mixture. The method utilizes a sulphite or a bisulphite, preferably ammonium bisulphite. It may be added as a salt or in solution. It is used in amounts by weight of from 2:1 salt: hydrogen sulphide.
Claims11
A method of removing hydrogen sulphide from crude oil or an oil and water emulsion which method comprises treating the crude oil or an oil and water emulsion with a solution of sulphite or bisulphite selected from the group consisting of alkali metals, alkaline earth metals, ammonium sulphite and ammonium bisulphite, wherein the pH of the solution of sulphite or bisulphite is maintained between about 4 and about 7 by the addition of an alkali, so as to prevent sulphur precipitation in the crude oil or oil and water emulsion being treated.
Dependencies are inferred from the claim text.