Catalyst-mediated in-situ generation of dioxirane
AssigneeTruox, Inc.
InventorRoy W. Martin
Life of this patent
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Abstract
A composition capable of expedited in-situ generation of dioxirane and a method of preparing the composition are presented. The composition includes a transition metal catalyst, peracid donor, and carbonyl donor, and forms an effective multi-purpose oxidizing (e.g., bleaching) solution. Methods of using the bleaching solutions and their application are also presented. The composition provides a cost-effective means of producing a dioxirane-based multi-purpose bleaching solution for use on laundries, carpets, hard surfaces, bathroom surfaces, floors and the like.
Claims36
A composition for catalyst-mediated in-situ generation of dioxirane and an oxidizing solution containing dioxirane with an oxidizing solution pH of less than about 6.0, the composition comprising:
- effective amounts of a transition metal catalyst;
- potassium peroxymonosulfate;
- and at least one dioxirane precursor comprising a carbonyl donor compound;
- wherein when the composition is admixed with water the transition metal catalyst catalyzes the decomposition of the potassium peroxymonosulfate forming a free radical, reaction of the free radical with the carbonyl donor, oxygen addition with the carbonyl donor, subsequent dioxirane formation, and wherein the composition comprises:
- about 0.001-1 wt. % transition metal catalyst measured as elemental metal;
- about 40-99 wt. % potassium peroxymonosulfate;
- 0.99-59.999 wt % carbonyl donor(s);
- and
- totaling 100 wt %.
A composition for catalyst-mediated in-situ generation of dioxirane and an oxidizing solution containing dioxirane and potassium peroxymonosulfate, the composition comprising:
- effective amounts of a transition metal catalyst;
- potassium peroxymonosulfate;
- and at least one dioxirane precursor comprising a carbonyl donor compound;
- wherein when the composition is admixed with water the transition metal catalyst catalyzes the decomposition of the potassium peroxymonosulfate forming a free radical, reaction of the free radical with the carbonyl donor, oxygen addition with the carbonyl donor, subsequent dioxirane formation, and wherein the composition comprises:
- about 0.001-1 wt. % transition metal catalyst measured as elemental metal;
- about 90.1-99.9 wt. % potassium peroxymonosulfate;
- 0.99-9.999 wt % carbonyl donor(s);
- and
- totaling 100 wt %.
A composition for catalyst-mediated in-situ generation of dioxirane and an oxidizing solution containing dioxirane with reduced potential of dye and fabric damage, the composition comprising:
- effective amounts of a transition metal catalyst;
- potassium peroxymonosulfate;
- and at least one dioxirane precursor comprising a carbonyl donor compound;
- wherein when the composition is admixed with water the transition metal catalyst catalyzes the decomposition of the potassium peroxymonosulfate forming a free radical, reaction of the free radical with the carbonyl donor, oxygen addition with the carbonyl donor, subsequent dioxirane formation, and wherein the composition comprises:
- about 0.001-1 wt. % transition metal catalyst measured as elemental metal;
- about 49.00-79.989 wt. % potassium peroxymonosulfate;
- 20.01-50.00 wt % carbonyl donor(s);
- and
- totaling 100 wt %.
Dependencies are inferred from the claim text.