Saturated quaternary ammonium compounds, glutaraldehyde, and tetrakis(hydroxymethyl)phosphonium sulfate for corrosion inhibition, cleaning, and biocidal efficacy in hydrogen systems
AssigneeChampionX LLC
InventorsJeremy Moloney, Jing Wu, Shelley Zhou
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Abstract
Methods for inhibiting corrosion, cleaning and/or providing biocidal efficacy in hydrogen rich environments that are in hydrogen systems or hydrogen mediums using saturated alkyl diquaternary compound containing compositions, saturated alkyl quaternary compound containing compositions, aldehyde containing compositions, and/or tetrakis(hydroxymethyl)phosphonium sulfate containing compositions are provided. The methods provide efficacious corrosion inhibition, cleaning and/or biocidal efficacy without loss of stability due to hydrogenation in hydrogen rich environments.
Claims32
A method of inhibiting corrosion in a hydrogen system comprising:
- contacting a surface comprising metal in a hydrogen system or medium with a corrosion-inhibiting composition comprising a saturated alkyl diquaternary ammonium compound having the following structure (III) or a saturated alkyl quaternary ammonium compound having the following structure (IV):
- wherein:
- R is a linear C8-C30 alkyl group,
- R1, R2, and R3 are independently a linear C1-C3 alkyl group, and
- X— is a halide;
- wherein:
- R1, R2, R3 and R4 are independently a linear C1-24 alkyl group, and X— is a halide;
- and
- reducing corrosion on the surface.
A method of cleaning and/or preventing biofouling in a hydrogen system comprising:
- contacting a surface in a hydrogen system or medium with a cleaning and/or biocidal composition comprising a saturated alkyl diquaternary ammonium compound, a saturated alkyl quaternary ammonium compound, an aldehyde comprising glutaraldehyde, formaldehyde or glyoxal, and/or tetrakis(hydroxymethyl)phosphonium sulfate;
- wherein the saturated alkyl diquaternary ammonium compound has the following structure (III) or a saturated alkyl quaternary ammonium compound having the following structure (IV):
- wherein:
- R is a linear C8-C30 alkyl group,
- R1, R2, and R3 are independently a linear C1-C3 alkyl group, and
- X— is a halide;
- wherein:
- R1, R2, R3 and R4 are independently a linear C1-24 alkyl group, and X— is a halide;
- and
- reducing a microbial population on the surface or in the hydrogen system or medium.
Dependencies are inferred from the claim text.