Back to results
US 12,593,842 B2Granted
In situ generation of peroxycarboxylic acids at alkaline pH, and methods of use thereof
AssigneeEcolab USA Inc.
InventorsJunzhong Li, David D. McSherry, Richard Staub
Life of this patent
Estimating the term…
Abstract
The present disclosure is related to percarboxylic acid compositions formed in situ in non-equilibrium reactions. The peroxycarboxylic acid compositions are formed using ester based starting materials. Methods for using the percarboxylic acid compositions are also disclosed.
Claims7
A premix peroxycarboxylic acid forming composition comprising:
- (a) a first composition comprising
- (i) from about 0.001 wt-% to about 90 wt-% of an ester of a polyhydric alcohol and a C5 to C18 carboxylic acid, wherein said ester has an HLB value of 3 or greater;
- (ii) from about 0.001 wt-% to about 99 wt-% of an oxidizing agent comprising a hydrogen peroxide donor;
- wherein the first composition has a pH of between about 2 and about 10;
- and
- (b) from about 0.001 wt-% to about 25 wt-% of a second composition comprising a source of alkalinity;
- wherein the second composition has a pH greater than about 12;
- and
- wherein the premix peroxycarboxylic acid forming composition has a pH greater than 12;
- wherein the premix peroxyformic acid forming composition is not at equilibrium;
- wherein the premix peroxyformic acid forming composition forms a peroxycarboxylic acid in situ;
- and
- wherein the premix peroxyformic acid forming composition is free of surfactant.
10 more elements
Dependencies are inferred from the claim text.