Peroxy acid generator
AssigneeEcolab Inc.
InventorsKeith D. Lokkesmoe, Thomas R. Oakes
Life of this patent
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Abstract
We have found a new and useful process to generate peroxy acid sanitizing and bleaching compositions at the point-of-use, the process comprising introducing hydrogen peroxide and a carboxylic acid into a reactor at about 0.1 to 10 moles of hydrogen peroxide per mole of acid, and contacting the hydrogen peroxide and carboxylic acid in the presence of a sulfonic acid resin and in the substantial abssence of active metal ions which forms an aqueous peroxy acid composition at a concentration from about up to 20 wt %. Using this process, warewashing, laundry sanitizing and bleach, and hard surface sanitizing compositions can be produced.
Claims30
A process for the point-of-use generation of a peroxyacetic acid containing composition, which process comprises:
- (a) introducing hydrogen peroxide and acetic acid into a packed column at a ratio of about 0.1 to 10 moles of hydrogen peroxide per mole of acetic acid;
- and
- (b) reacting the hydrogen peroxide and acetic acid in an aqueous solution comprising about 0.1 to 15 wt-% swell prevention agent in the presence of a strong acid resin catalyst at a reaction temperature of less than about 50.degree. C. to form an aqueous peroxyacetic acid composition at a concentration from about 10 to 20 wt-%.
A process for the point-of-use generation of a peroxy-carboxylic acid sanitizing and bleaching composition, which process comprises:
- (a) introducing aqueous hydrogen peroxide and a carboxylic acid at a ratio of about 0.1 to 10 moles hydrogen peroxide per mole of carboxylic acid and a swell prevention agent into a reactor containing a strong acid resin catalyst;
- and
- (b) passing the aqueous solution of hydrogen peroxide, carboxylic acid and swell prevention agent through the strong acid resin catalyst at a reaction temperature of less than about 50.degree. C. to form an aqueous peroxycarboxylic acid composition at a concentration up to about 20 wt-% peroxycarboxylic acid.
Dependencies are inferred from the claim text.