Inhibiting corrosion caused by aqueous aldehyde solutions
AssigneeBaker Hughes Incorporated
InventorsStephen R. Keenan, Jonathan Collins, Sunder Ramachandran, Vladimir Jovancicevic, Rose Tompkins, Grahame N. Taylor, Richard L. Martin, Michael L. Walker
Life of this patent
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Abstract
Aldehydes useful as H2S sulfide scavengers may be corrosive to some metals such as steel, iron and aluminum, but the corrosive effect of the aldehydes may be mitigated by employing a corrosion inhibitor selected from the group consisting of a di-basic soluble phosphate salt, a tri-basic soluble phosphate salt, a phosphate ester, a thiophosphate ester, a thioamine, a Mannich Reaction Product, and combinations thereof.
Claims19
A method for employing an aldehyde selected from the group consisting of glyoxal, acrolein, glutaraldehyde, and combinations thereof, in an aqueous solution while mitigating corrosion of metal in contact with the aldehyde solution, the method comprising employing a corrosion inhibitor with the aldehyde wherein the corrosion inhibitor comprises a member selected from the group consisting of a mono-basic soluble phosphate salt, a di-basic soluble phosphate salt, a tri-basic soluble phosphate salt, a phosphate ester, a thiophosphate ester, a thioamine, a Mannich Reaction Product, and combinations thereof.
A process for exploring for or producing crude oil and/or natural gas comprising employing a H2S sulfide scavenger solution comprising an aldehyde and employing a corrosion inhibitor in the solution comprising a member selected from the group consisting of a mono-basic soluble phosphate salt, a di-basic soluble phosphate salt, a tri-basic soluble phosphate salt, a phosphate ester, a thiophosphate ester, a thioamine, Mannich Reaction Product, and combinations thereof, wherein the aldehyde is selected from the group consisting of glyoxal, acrolein, glutaraldehyde, and combinations thereof.
Dependencies are inferred from the claim text.