Automatic dishwashing compositions comprising cobalt chelated catalysts
First Claim
1. A method of washing tableware in a domestic automatic dishwashing appliance, said method comprising treating the soiled tableware in an automatic dishwasher with an aqueous alkaline bath comprising a source of hydrogen peroxide and a cobalt catalyst having the formula:
-
space="preserve" listing-type="equation">[Co.sub.n L.sub.m X.sub.p ].sup.z Y.sub.zwherein n is an integer from 1 to 4;
m is an integer from 1 to 12;
p is an integer from 0 to 8;
Y is a counterion selected dependent on the charge z of the complex;
X is a coordinating species selected from the group consisting of Cl-, Br-, I-, F-, NCS-, I3, - OH, O22-, O2-, HOO-, H2 O, SH, CN-, OCN-, S42-, NH3, NR3, RCOO-, RO- ;
##STR8## RSO3- and RSO4- in which R is selected from hydrogen, substituted and unsubstituted alkyl, substituted and unsubstituted aryl, and R'"'"'COO- where R'"'"' is selected from substituted and unsubstituted alkyl and substituted and unsubstituted aryl, and mixtures thereof; and
L is an organic ligand molecule having the general formula ##STR9## wherein R1 and R2 can each be zero, H, substituted and unsubstituted alkyl, substituted and unsubstituted aryl;
each D can be independently N, NR, PR, O, S, wherein R is H, substituted or unsubstituted alkyl, and substituted or unsubstituted aryl;
t and t'"'"' are each independently 2 or 3, and s=2, 3, 4, or 5.
0 Assignments
0 Petitions
Accused Products
Abstract
Automatic dishwashing detergent compositions comprising certain cobalt catalysts are provided. More specifically, the invention relates to automatic dishwashing detergents which provide enhanced cleaning/bleaching benefits (especially tea stain removal) through the selection of cobalt chelated catalysts having the formula:
[Co.sub.n L.sub.m X.sub.p ].sup.z Y.sub.z.
Preferred automatic dishwashing compositions comprise amylase and/or protease enzymes. Included are methods for washing tableware in domestic automatic dishwashing appliances using the cobalt catalysts.
-
Citations
12 Claims
-
1. A method of washing tableware in a domestic automatic dishwashing appliance, said method comprising treating the soiled tableware in an automatic dishwasher with an aqueous alkaline bath comprising a source of hydrogen peroxide and a cobalt catalyst having the formula:
-
space="preserve" listing-type="equation">[Co.sub.n L.sub.m X.sub.p ].sup.z Y.sub.zwherein n is an integer from 1 to 4;
m is an integer from 1 to 12;
p is an integer from 0 to 8;
Y is a counterion selected dependent on the charge z of the complex;
X is a coordinating species selected from the group consisting of Cl-, Br-, I-, F-, NCS-, I3, - OH, O22-, O2-, HOO-, H2 O, SH, CN-, OCN-, S42-, NH3, NR3, RCOO-, RO- ;
##STR8## RSO3- and RSO4- in which R is selected from hydrogen, substituted and unsubstituted alkyl, substituted and unsubstituted aryl, and R'"'"'COO- where R'"'"' is selected from substituted and unsubstituted alkyl and substituted and unsubstituted aryl, and mixtures thereof; and
L is an organic ligand molecule having the general formula ##STR9## wherein R1 and R2 can each be zero, H, substituted and unsubstituted alkyl, substituted and unsubstituted aryl;
each D can be independently N, NR, PR, O, S, wherein R is H, substituted or unsubstituted alkyl, and substituted or unsubstituted aryl;
t and t'"'"' are each independently 2 or 3, and s=2, 3, 4, or 5. - View Dependent Claims (2)
-
-
3. A method of washing tableware in a domestic automatic dishwashing appliance, said method comprising treating the soiled tableware in an automatic dishwasher with an aqueous alkaline bath comprising an automatic dishwashing detergent composition comprising:
-
(a) a catalytically effective amount of a cobalt chelated catalyst having the formula;
space="preserve" listing-type="equation">[Co.sub.n L.sub.m X.sub.p ].sup.z Y.sub.zwherein n is an integer from 1 to 4;
m is an integer from 1 to 12;
p is an integer from 0 to 8;
Y is a counterion selected dependent on the charge z of the complex;
X is a coordinating species selected from the group consisting of Cl-, Br-, I-, F-, NCS-, I3, - OH, O22-, O2-, HOO-, H2 O, SH, CN-, OCN-, S42-, NH3, NR3, RCOO-, RO- ;
##STR10## RSO3- and RSO4- in which R is selected from hydrogen, substituted and unsubstituted alkyl, substituted and unsubstituted aryl, and R'"'"'COO- where R'"'"' is selected from substituted and unsubstituted alkyl and substituted and unsubstituted aryl, and mixtures thereof; and
L is an organic ligand molecule having the general formula ##STR11## wherein R1 and R2 can each be zero, H, substituted and unsubstituted alkyl, substituted and unsubstituted aryl;
each D can be independently N, NR, PR, O, S, wherein R is H, substituted or unsubstituted alkyl, and substituted or unsubstituted aryl;
t and t'"'"' are each independently 2 or 3, and s=2, 3, 4, or 5.(b) an effective amount of a source of hydrogen peroxide; and (c) automatic dishwashing detergent adjunct materials. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
-
-
4. A method for removing tea and/or coffee stains from tableware in a domestic automatic dishwashing appliance, said method comprising treating tea-stained tableware in an automatic dishwasher with an aqueous alkaline bath comprising a source of hydrogen peroxide and the cobalt catalyst of the formula:
-
space="preserve" listing-type="equation">[Co.sub.n L.sub.m X.sub.p ].sup.z Y.sub.zwherein n is an integer from 1 to 4;
m is an integer from 1 to 12;
p is an integer from 0 to 8;
Y is a counterion selected dependent on the charge z of the complex;
X is a coordinating species selected from the group consisting of Cl-, Br-, I-, F-, NCS-, I3, - OH, O22-, O2-, HOO-, H2 O, SH, CN-, OCN-, S42-, NH3, NR3, RCOO-, RO- ;
##STR12## RSO3- and RSO4- in which R is selected from hydrogen, substituted and unsubstituted alkyl, substituted and unsubstituted aryl, and R'"'"'COO- where R'"'"' is selected from substituted and unsubstituted alkyl and substituted and unsubstituted aryl, and mixtures thereof; and
L is an organic ligand molecule having the general formula ##STR13## wherein R1 and R2 can each be zero, H, substituted and unsubstituted alkyl, substituted and unsubstituted aryl;
each D can be independently N, NR, PR, O, S, wherein R is H, substituted or unsubstituted alkyl, and substituted or unsubstituted aryl;
t and t'"'"' are each independently 2 or 3, and s=2, 3, 4, or 5.
-
-
5. A method for washing tableware in a domestic automatic dishwashing appliance, said method comprising treating the soiled tableware during a wash cycle of an automatic dishwasher with an aqueous alkaline bath comprising a source of hydrogen peroxide, followed by treating the tableware during the subsequent rinse cycle with an aqueous bath comprising a cobalt catalyst having the formula:
-
space="preserve" listing-type="equation">[Co.sub.n L.sub.m X.sub.p ].sup.z Y.sub.zwherein n is an integer from 1 to 4;
m is an integer from 1 to 12;
p is an integer from 0 to 8;
Y is a counterion selected dependent on the charge z of the complex;
X is acoordinating species selected from the group consisting of Cl-, Br-, I-, F-, NCS-, I3, - OH, O22-, O2-, HOO-, H2 O, SH, CN-, OCN-, S42-, NH3, NR3, RCOO-, RO- ;
##STR14## RSO3- and RSO4- in which R is selected from hydrogen, substituted and unsubstituted alkyl, substituted and unsubstituted aryl, and R'"'"'COO- where R'"'"' is selected from substituted and unsubstituted alkyl and substituted and unsubstituted 15 aryl, and mixtures thereof; and
L is an organic ligand molecule having the general formula ##STR15## wherein R1 and R2 can each be zero, H, substituted and unsubstituted alkyl, substituted and unsubstituted aryl;
each D can be independently N, NR, PR, O, S, wherein R is H, substituted or unsubstituted alkyl, and substituted or unsubstituted aryl;
t and t'"'"' are each independently 2 or 3, and s =2, 3, 4, or 5.
-
Specification