US 12,435,298 B2
Stain removal through novel oxidizer and chelant combination
David Dotzauer, Saint Paul, MN (US); John Mansergh, Saint Paul, MN (US); Krista Otting, Saint Paul, MN (US); and Tobias Neil Foster, Saint Paul, MN (US)
Assigned to ECOLAB USA INC., Saint Paul, MN (US)
Filed by ECOLAB USA INC., Saint Paul, MN (US)
Filed on Jun. 19, 2024, as Appl. No. 18/747,970.
Application 17/451,057 is a division of application No. 15/741,685, abandoned, previously published as PCT/EP2015/065399, filed on Jul. 6, 2015.
Application 18/747,970 is a continuation of application No. 17/451,057, filed on Oct. 15, 2021, granted, now 12,054,694.
Prior Publication US 2024/0336878 A1, Oct. 10, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. C11D 3/39 (2006.01); B08B 3/08 (2006.01); C11D 3/06 (2006.01); C11D 3/10 (2006.01); C11D 3/33 (2006.01); C11D 7/12 (2006.01); C11D 7/16 (2006.01); C11D 7/32 (2006.01)
CPC C11D 3/393 (2013.01) [B08B 3/08 (2013.01); C11D 3/06 (2013.01); C11D 3/10 (2013.01); C11D 3/33 (2013.01); C11D 3/3932 (2013.01); C11D 7/12 (2013.01); C11D 7/16 (2013.01); C11D 7/3245 (2013.01); C11D 2111/24 (2024.01)] 12 Claims
 
1. 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):

OG Complex Work Unit Chemistry
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.