Use of urea or a urea/chelator combination to chemically stabilize peroxycarboxylic acid and peroxide formulations
AssigneeEcolab USA Inc.
InventorsChris Nagel, Junzhong Li
Life of this patent
Estimating the term…
Abstract
Stabilized peroxide-containing compositions stabilized with urea and urea/chelator stabilizer blends are provided. The compositions are particularly suitable for, but not limited to, cleaning applications on surfaces within food and beverage industries which may require the use of materials that are acceptable for incidental food/food products/feed contact. Further, the stabilized compositions are particularly suitable for applications requiring materials that are generally regarded as safe (GRAS) or for applications where non-GRAS materials must be minimized. Methods of stabilizing peroxide-containing compositions and methods of using the compositions are also provided.
Claims19
A food safe stabilized equilibrium peroxide-containing composition comprising:
- from about 20 wt-% to about 70 wt % of hydrogen peroxide based on the total weight of the peroxide-containing composition;
- a C1-C22 peroxycarboxylic acid;
- a C1-C22 carboxylic acid;
- a stabilizing agent comprising urea;
- an additional stabilizing agent and/or an acid additive comprising an organic acid, an inorganic acid, or a combination thereof;
- and
- water;
- wherein the urea stabilizes the peroxide-containing composition without an additional stabilizing agent or reduces the concentration of the additional stabilizing agent to less than 3 wt-%.
A method of stabilizing a peroxide-containing composition comprising:
- combining an oxidizing compound which is hydrogen peroxide, a C1-C22 peroxycarboxylic acid, C1-C22 carboxylic acid, a stabilizing agent comprising urea, an additional stabilizing agent and/or an acid additive comprising an organic acid, an inorganic acid, or a combination thereof;
- and water, wherein hydrogen peroxide is present in an amount from about 20 wt. % to about 70 wt. % based on the total weight of the peroxide-containing composition;
- wherein at least 80% of the oxidizing compound concentration is retained after storage of up to one year at room temperature, and wherein the urea stabilizes the peroxide containing composition without an additional stabilizing agent or reduces the concentration of the additional stabilizing agent to less than 3 wt. %.
Dependencies are inferred from the claim text.