Claims
- 1. A bleaching composition comprising:
- (a) from about 0.04% to about 1% by weight of the composition of a cobalt catalyst having the formula:
- �Co(NH.sub.3).sub.5 M!T.sub.y
- wherein cobalt is in the +3 oxidation state; M is a carboxylate-containing ligand having the formula RC(O)O--, wherein R is selected from the group consisting of hydrogen and C.sub.1 -C.sub.30 unsubstituted and substituted alkyl, C.sub.6 -C.sub.30 unsubstituted and substituted aryl, and C.sub.3 -C.sub.30 unsubstituted and substituted heteroaryl, wherein substituents are selected from the group consisting of --NR'.sub.3, --NR'.sub.4.sup.+, --C(O)OR', --OR', --C(O)NR'.sub.2, wherein R' is selected from the group consisting of hydrogen and C.sub.1 -C.sub.6 moieties, except that RC(O)O is not oxalate; and T is one or more counteranions present in a number y, where y is an integer to obtain a charge-balanced salt;
- (b) from about 0.1% to about 70%, by weight, of a source of hydrogen peroxide; and
- (c) from about 1% to about 80%, by weight, of builder.
- 2. The bleaching composition according to claim 1 in the form of an automatic dishwashing detergent composition which produces less than 2 inches of suds.
- 3. An automatic dishwashing detergent composition according to claim 2 comprising from about 0.1% to about 20% by weight of the composition of one or more low foaming nonionic surfactants.
- 4. The bleaching composition according to claim 1 in the form of a laundry detergent composition comprising from about 0.1% to about 20% by weight of the composition of one or more anionic surfactants.
- 5. A laundry detergent composition according to claim 4 comprising from about 1% to about 80% by weight of the composition of one or more builders selected from zeolite, layered silicate and mixtures thereof, and from about 0.1% to about 20% by weight of the composition of one or more anionic surfactants selected from linear alkyl benzene sulfonates, alkyl sulfates, alkyl ethoxy sulfates, and mixtures thereof.
- 6. The bleaching composition according to claim 1 wherein R is selected from the group consisting of hydrogen, methyl, ethyl, propyl, straight or branched C.sub.4 -C.sub.12 alkyl, and benzyl.
- 7. The bleaching composition according to claim 1 wherein R is selected from the moieties --(CH.sub.2).sub.n OH and --(CH.sub.2).sub.n NR'.sub.4.sup.+, wherein n is an integer from 1 to about 16.
- 8. The bleaching composition according to claim 1 wherein the M ligand is a carboxylic acid moiety selected from formic, benzoic, octanoic, nonanoic, decanoic, dodecanoic, and acetic acid.
- 9. The bleaching composition according to claim 8 wherein M is an acetic acid moiety.
- 10. A method for removing tea and coffee stains from hard surfaces, said method comprising treating tea-stained or coffee-stained hard surface with an aqueous alkaline bath comprising a source of hydrogen peroxide and from about 0.1 to about 50 ppm of the cobalt bleach catalyst of the formula:
- �Co(NH.sub.3).sub.5 M!T.sub.y
- wherein cobalt is in the +3 oxidation state; M is a carboxylate-containing ligand having the formula RC(O)O--, wherein R is selected from the group consisting of hydrogen and C.sub.1 -C.sub.30 unsubstituted and substituted alkyl, C.sub.6 -C.sub.30 unsubstituted and substituted aryl, and C.sub.3 -C.sub.30 unsubstituted and substituted heteroaryl, wherein substituents are selected from the group consisting of --NR'.sub.3, --NR'.sub.4.sup.+, --C(O)OR', --OR', --C(O)NR'.sub.2, wherein R' is selected from the group consisting of hydrogen and C.sub.1 -C.sub.6 moieties, except that RC(O)O is not oxalate; and T is one or more counteranions present in a number y, where y is an integer to obtain a charge-balanced salt.
- 11. The method according to claim 10 wherein R is selected from the group consisting of C.sub.1 -C.sub.18 unsubstituted and substituted alkyl.
- 12. The method according to claim 11 wherein R is selected from the group consisting of hydrogen, methyl, ethyl, propyl, straight or branched C.sub.4 -C.sub.12 alkyl, and benzyl.
- 13. The method according to claim 12 wherein R is methyl.
- 14. The method according to claim 11 wherein R is selected from the moieties --(CH.sub.2).sub.n OH and --(CH.sub.2).sub.n NR'.sub.4.sup.+, wherein n is an integer from 1 to about 16.
- 15. The method according to claim 10 wherein the M ligand is a carboxylic acid moiety selected from formic, benzoic, octanoic, nonanoic, decanoic, dodecanoic, and acetic acid.
CROSS REFERENCE TO RELATED APPLICATION
This is a continuation of application Ser. No. 08/508,197, filed on Jul. 27, 1995, now abandoned which is a continuation-in-part application of U.S. application Ser. No. 08/491,238, now abandoned, filed Jun. 16, 1995.
US Referenced Citations (52)
Foreign Referenced Citations (1)
Number |
Date |
Country |
143491 |
Jun 1985 |
EPX |
Continuations (1)
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Number |
Date |
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Parent |
508197 |
Jul 1995 |
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Continuation in Parts (1)
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Number |
Date |
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491238 |
Jun 1995 |
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