Quaternary fatty acid esters as corrosion inhibitors
AssigneeEcolab USA Inc.
InventorKeith A. Monk
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Abstract
Corrosion inhibitor compositions, methods of inhibiting or reducing corrosion, and methods of manufacturing corrosion inhibitor compositions are disclosed herein. In certain methods, the corrosion inhibitor compositions may be added to an aqueous industrial system having at least one surface. The aqueous industrial system may be a water recirculating system, a cooling water system, a boiler water system, a pulp slurry, a papermaking process, a ceramic slurry, a mixed solid/liquid system, or an oil-field system. A method of manufacturing a corrosion inhibitor composition may include reacting an alkanolamine with a fatty acid to form a fatty acid ester reaction product and reacting the fatty acid ester reaction product with an alkyl halide or an acrylate.
Claims20
A corrosion inhibitor composition comprising a corrosion inhibitor having the following general structure:
- wherein n is 1 or 2;
- x is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, or 22;
- y is an integer corresponding to a number of hydrogen atoms necessary for each carbon of the CxHy group to form four covalent bonds;
- R is H, a benzyl group, a linear alkyl group, or a branched alkyl group;
- and X− is an anion.
A method of inhibiting corrosion comprising adding an effective amount of a composition comprising a corrosion inhibitor comprising a hydrolysable functional group to an aqueous industrial system having at least one surface and inhibiting corrosion of the at least one surface.
A method of manufacturing a composition comprising a quaternary ammonium corrosion inhibitor comprising:
- reacting an alkanolamine with a fatty acid in a reaction vessel to form a fatty acid ester reaction product;
- and
- reacting the fatty acid ester reaction product with an alkyl halide or an acrylate in the reaction vessel, thereby forming the quaternary ammonium corrosion inhibitor.
Dependencies are inferred from the claim text.