Peroxygen compositions
AssigneeSolvay Interox Limites
InventorsGraham Carr, Alun Pryce James
Life of this patent
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Abstract
Storage stable, aqueous acidic solutions having a pH in the range of from 1 to 5 comprising at least one ester peracid having general formula where R represents an alkyl group having from 1 to 4 carbons and x equals 1 to 4, are provided. The solutions can be prepared by contacting an aqueous solution of a carboxylic compound having general formula where x is from 1 to 4 and R represents an alkyl group having from 1 to 4 carbons with an inorganic peroxygen compound, preferably hydrogen peroxide, at a pH of less than 4 until at least some ester peracid is produced, and thereafter adjusting the pH to be in the range of from 1 to 5, if necessary.
Claims26
A storage stable, aqueous acidic equilibrium solution containing a peracid component in solution and having a pH in the range of from 1 to 5, said peracid component comprising at least one ester peracid having the general formula:
- where R represents an alkyl group having from 1 to 4 carbons and x is from 1 to 4, said ester peracid being present in an amount of from 0.1% to 15% by weight of the solution.
A process for preparing a storage stable, aqueous acidic equilibrium solution comprising at least one ester peracid, which comprises contacting an aqueous solution comprising at least one carboxylic compound having the general formula:
- where x is from 1 to 4 and R represents an alkyl group having from 1 to 4 carbons, with an inorganic peroxygen compound in the presence of an acid catalyst to produce in said solution, at a pH of less than 1, an ester peracid having the general formula:
- where R represents an alkyl group having from 1 to 4 cabons and x is from 1 to 4, and, after the ester peracid has reached a desired concentration, adjusting the pH of the solution to be in the range of from 1 to 5.
A process for the storage of a aqueous acidic equilibrium solution containing a peracid component, said peracid component comprising at least one ester peracid having the general formula:
- where R represents an alkyl group having from 1 to 4 carbons and x is from 1 to 4, said ester peracid being present in an amount of from 0.1% to 15% by weight of the solution, said process comprising storing said solution at a pH of from 1 to 5.
A method for disinfecting which comprises:
- providing a storage stable, aqueous acidic equilibrium solution containing a peracid component in solution and having a pH in the range of from 1 to 5, said peracid component comprising at least one ester peracid having the general formula:
- where R represents an alkyl group having from 1 to 4 carbons and x is from 1 to 4, said ester peracid being present in an amount of from 0.1% to 15% by weight of the solution;
- diluting said storage stable solution to produce a dilute aqueous solution containing said ester peracid in said dilute aqueous solution in an amount of from 1 to 10,000 ppm;
- and
- contacting a substrate to be disinfected with said dilute aqueous solution.
Dependencies are inferred from the claim text.