Reducing agent as corrosion inhibitor for neutral or low alkaline warewash detergent
AssigneeEcolab USA Inc.
InventorsSteven Lundberg, Jesse Ray Murphy, Jack Lehman, John Mansergh
Life of this patent
Estimating the term…
Abstract
Warewash detergent compositions with reducing agents to overcome corrosion challenges in stainless steel dish machines subject to conditions from chlorine sanitizing rinse steps (or other oxidizing chlorine containing compositions) are provided. Detergent compositions or booster compositions used in combination with detergents beneficially containing a reducing agent that reacts with chlorine introduced in sanitizing rinse steps that follow detergent cleaning steps are provided. Methods for ware washing using the detergent compositions with reducing agents and methods for reducing residual chlorine in a ware washing cycle are also provided.
Claims14
A detergent composition consisting of:
- from about 1 wt-% to about 10 wt-% of a reducing agent is a sulfite, sulfate, bisulfite, bisulfate, thiosulfite, or thiosulfate or combinations thereof;
- from about 0.1 wt-% to about 50 wt-% of an alkalinity source and buffering agent which is an acid, wherein the alkalinity source and buffering agent provides a use solution pH between about 6 and about 10;
- from about 0.01 wt-% to about 10 wt-% of at least one enzyme;
- at least one polyol enzyme stabilizer which is glycerine, sorbitol, or combinations thereof;
- water;
- from about 0.1 wt-% to about 60 wt-% at least one additional functional ingredient which is at least one builder, at least one water conditioning polymer, preservative, or at least one surfactant or combinations thereof.
Dependencies are inferred from the claim text.