Peroxygen compound
AssigneeInterox Chemicals Limited
InventorsGeoffrey J. Hignett, Kenneth T. Rowbottom, William R. Sanderson
Life of this patent
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Abstract
Increased energy costs have stimulated a demand for peroxygen compounds that are effective at ambient to hand-hot temperatures, but peroxyacids and acyl peroxides tend to suffer from one or more of poor thermal stability, or sensitivity to impact, thereby rendering their manufacture or storage hazardous, or from poor solubility. The instant invention provides a salt of the formula (in anhydrous form): ##STR1## The salt can be incorporated in low temperature bleaching compositions, in washing compositions, in sanitizing compositions or in disinfection/sterilization compositions.
Claims23
In solid form, a salt, expressed in anhydrous form, having the general formula:
- ##STR4##
A process for the manufacture of the monomagnesium salt of 3-sulphoperoxybenzoic acid comprising reacting a suspension of the corresponding salt of 3-sulphobenzoic acid or salt thereof in the presence of a strong acid with concentrated hydrogen peroxide until at least some of the carboxylic acid groups have been peroxidised at a temperature selected in the range of ambient to 60.degree. C., precipitating the monomagnesium salt of 3-sulphoperoxybenzoic acid, and separating the precipitate from its mother liquor.
A desensitised peroxygen composition comprising magnesium 3-sulphoperoxybenzoic acid, hereinafter MMSPB, in intimate contact with a solid diluent in an amount of at least half the weight of MMSPB.
A bleach composition comprising a buffering agent or pH regulator and MMSPB, in such relative amounts that a 1% solution of the composition in water has a pH of 7 to 8.5.
A washing composition comprising a surfactant and at least 0.5% w/w MMSPB.
A sanitising composition comprising 1% to 70% alkali metal chloride or bromide, 0.5% to 40% MMSPB, 0 to 50% surfactant, and 0 to 20% builder.
A composition according to any one of claims 14 to 18 or 24 which additionally contains from 0.1 to 5% w/w of a complexing agent that satisfies the general formula:
- ##STR5## in which X represents a carboxylic acid or a phosphonic acid group or an alkali or alkaline earth metal salt thereof, and in which a represents 0, 1 or 2.
Dependencies are inferred from the claim text.