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US 2025/0059467 A1Published application
Alkaline cleaning compositions comprising an alkylamino hydroxy acid and/or secondary amine and methods of reducing metal corrosion
AssigneeEcolab USA Inc.
InventorsJennifer Stokes, Carter M. Silvernail, Paul Frazer Schacht, Anthony W. Erickson
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Abstract
The invention relates to compositions, methods of manufacture, and methods for reducing metal corrosion during alkaline cleaning. In particular, the method employs an alkylamino hydroxy acid, secondary amine, or combination thereof in alkaline cleaning of hard surfaces.
Claims20
A cleaning system for clean-in-place surfaces comprising:
- a clean-in-place unit comprising one or more surfaces;
- wherein the one or more surfaces comprise aluminum, an aluminum alloy, nickel, a nickel alloy, tin, a tin alloy, 300 series stainless steel, a 300 series stainless steel alloy, 400 stainless steel, or a 400 stainless steel alloy;
- an alkalinity source in fluid communication with the one or more surfaces;
- wherein the alkalinity source comprises an alkali metal hydroxide;
- an alkylamino hydroxy acid in fluid communication with the one or more surfaces, wherein the alkylamino hydroxy acid comprises one or more 3-alkylamino-2-hydroxysuccinic acid compounds and/or salts thereof;
- water in fluid communication with the one or more surfaces;
- wherein the alkalinity source and alkylamino hydroxy acid are in separate parts.
4 more elements
:
- The system of claim 3, wherein the alkylamino hydroxy acid is dispensed in the aqueous cleaning solution at a concentration of between about 0.01% (active) and about 1% (active), and wherein the alkalinity source is dispensed in an aqueous cleaning solution at a concentration of between about 0.1% (active) and about 6% (active).
A cleaning system for clean-out-of-place surfaces comprising:
- a clean-out-of-place unit comprising one or more surfaces;
- wherein the one or more surfaces comprise aluminum, an aluminum alloy, nickel, a nickel alloy, tin, a tin alloy, 300 series stainless steel, a 300 series stainless steel alloy, 400 stainless steel, or a 400 stainless steel alloy;
- an alkalinity source in fluid communication with the one or more surfaces;
- wherein the alkalinity source comprises an alkali metal hydroxide;
- an alkylamino hydroxy acid in fluid communication with the one or more surfaces, wherein the alkylamino hydroxy acid comprises one or more 3-alkylamino-2-hydroxysuccinic acid compounds and/or salts thereof;
- water in fluid communication with the one or more surfaces;
- wherein the alkalinity source and alkylamino hydroxy acid are in separate parts.
4 more elements
Dependencies are inferred from the claim text.