Composition and method for elimination of hydrogen sulfide and mercaptans
AssigneeLyra Energy SRL
InventorsKonstantin Poukalov, SR., Alexander Semenyuk, Kevin G. Liu
Life of this patent
Estimating the term…
Abstract
A scavenging composition and method for scavenging hydrogen sulfide and/or mercaptans from fluids. The scavenging composition comprises an alkali metal nitrite and a nitrogen-containing scavenger, and optionally an inorganic base, as a hydrogen sulfide and/or a mercaptan scavenger for hydrocarbon fluids, particularly for crude oil, field oil, fuel oil, straight run distillates, cracked distillates, residual fuels, natural gas, petroleum associated gas and the like.
Claims8
A method for scavenging a sulfur-containing compound contained in a hydrocarbon medium, wherein the sulfur-containing compound is hydrogen sulfide, a mercaptan or a combination thereof, the method comprising:
- contacting the hydrocarbon medium with an aqueous solution comprising:
- from 10 to 25 wt. % of an alkali metal nitrite selected from the group consisting of sodium nitrite, potassium nitrite, and combinations thereof,
- from 5 to 25 wt. % of at least one organic nitrogen-containing scavenger comprising di-alcohol amines, tri-alcohol amines, or a combination thereof, and
- from 1 to 10 wt. % of an alkali metal hydroxide.
A scavenger composition comprising:
- from 10 to 25 wt. % of an alkali metal nitrite selected from the group consisting of sodium nitrite, potassium nitrite, and combinations thereof,
- from 5 to 25 wt. % of at least one organic nitrogen-containing scavenger comprising di-alcohol amines, tri-alcohol amines, or a combination thereof,
- from 1 to 10 wt. % of an alkali metal hydroxide, and
- water.
Dependencies are inferred from the claim text.