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US 12,435,298 B2Granted
Stain removal through novel oxidizer and chelant combination
AssigneeEcolab USA Inc.
InventorsDavid Dotzauer, John Mansergh, Krista Otting, Tobias Neil Foster
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Abstract
The present invention relates to a detergent composition comprising alkali metal carbonate, a chelant selected from the group consisting of MGDA, alkali metal tripolyphosphate, GLDA, and mixtures thereof, alkali metal percarbonate, and a peroxidation catalyst, wherein the molar ratio of chelant to alkali metal percarbonate is in the range of 1.8 to 3.4. The detergent composition is particularly suited for the removal of tea and coffee stains.
Claims12
A detergent composition consisting of:
- alkali metal carbonate,
- a chelant that is methylglycinediacetic acid (MGDA) and optionally glutamic acid N,N-diacetic acid (GLDA) and/or alkali metal tripolyphosphate,
- alkali metal percarbonate,
- a peroxidation catalyst according to formula (XIX) or formula (XX):
- optionally water, silicates, detergent fillers or binding agents, polyoxypropylene-polyoxethylene block copolymer nonionic surfactants, enzymes, dyes, odorants, aminotris(methylenephosphonic acid), and mixtures thereof;
- wherein the molar ratio of chelant to alkali metal percarbonate is in the range of 1.8 to 3.4;
- wherein said molar ratio is calculated based on the total molar amount of methylglycinediacetic acid, glutamic acid N,N-diacetic acid, and alkali metal tripolyphosphate;
- wherein for the purpose of calculating said molar ratio alkali metal percarbonate is assumed to have the formula 2(M2CO3)·3H2O2, where M represents an alkali metal.
5 more elements
Dependencies are inferred from the claim text.