Bleaching compositions containing mixed metal cations adsorbed onto aluminosilicate support materials

Claim 2

A bleaching composition comprising: (a) a peroxy compound; and (b) a bleach catalyst comprising an aluminosilicate support material whereon is adsorbed a water-soluble manganese (II) salt and a salt of a divalent metal cation selected from magnesium or zinc; the weight ratio of manganese (II) to divalent metal cation being from about 1:20 to 20:1, the ratio of divalent metal cation to aluminosilicate support material ranging from about 1:1000 to 1:10, and the weight ratio of catalyst to peroxy compound being from about 1:100 to 1:1.

Claim 3

A bleaching composition according to claim 1 wherein the aluminosilicate support material is a zeolite.

Claim 4

A bleaching composition according to claim 1 wherein the aluminosilicate support material has a pore size from about 3 to 10 Angstroms.

Claim 5

A bleaching composition according to claim 1 wherein the aluminosilicate support material is silicoalumino phosphate.

Claim 6

A bleaching composition according to claim 1 wherein the peroxy compound is sodium perborate.

Claim 7

A bleaching composition according to claim 1 further comprising an inorganic phosphate salt stabilizer in an amount from about 5 to 35% by weight of the total composition.

Claim 8

A bleaching composition according to claim 6 wherein the phosphate stabilizer is chosen from the group consisting of tripolyphosphate, orthophosphate, pyrophosphate and mixtures thereof.

Claim 9

A bleaching composition according to claim 1 further comprising from 1 to 98% of laundry detergent adjuncts selected from the group consisting of surfactants, builders, fabric softeners, enzymes, inorganic fillers, colorants, lather boosters and mixtures thereof.

Claim 10

A process for preparation of a catalyst for the controlled decomposition of peroxy compounds comprising: (a) dissolving a water-soluble salt of manganese (II) and of a divalent metal cation selected from magnesium or zinc, in a solvent and therein suspending an aluminosilicate support material to form a slurry, the weight ratio of divalent metal cation to the aluminosilicate ranging from 1:1000 to 1:10 and of manganese (II) to divalent metal cation ranging from about 1:20 to 20:1; (b) adjusting pH to achieve a value from about 7.0 to 11.1; (c) agitating the slurry mixture of divalent metal salt and aluminosilicate support material; (d) separating solids from the slurry and washing said solid composition with solvent to remove any traces of free manganese (II) salts; and (e) drying the solid composition to remove solvent and moisture.

Claim 11

A process for preparation of a catalyst for the controlled decomposition of peroxy compounds comprising: (a) dissolving a water-soluble salt of manganese (II) and of a divalent metal cation selected from magnesium or zinc, in a solvent and therein suspending an aluminosilicate support material to form a slurry, the weight ratio of divalent metal cation to the aluminosilicate ranging from 1:1000 to 1:10 and of manganese (II) to divalent metal cation ranging from about 1:20 to 20:1; (b) adjusting pH to achieve a value from about 7.0 to 11.1; (c) agitating the slurry mixture of divalent metal salt and aluminosilicate support material; (d) separating solids from the slurry and washing said solid composition with solvent to remove any traces of free manganese (II) salts; and (e) drying the solid composition to remove solvent and moisture.

Claim 12

A process according to claim 9 wherein the aluminosilicate support material is a zeolite.

Claim 13

A process according to claim 9 wherein the aluminosilicate support material has a pore size from about 3 to 10 Angstroms.

Claim 14

A process according to claim 9 wherein the aluminosilicate support material is silicoalumino phosphate.

Claim 15

A process according to claim 9 wherein the peroxy compound is sodium perborate.

Claim 16

A process according to claim 9 further comprising an inorganic phosphate salt stabiizer in an amount from about 5 to 35% by weight of the total composition.

Claim 17

A process according to claim 14 wherein the phosphate stabilizer is chosen from the group consisting of tripolyphosphate, orthophosphate, pyrophosphate and mixtures thereof.

Claim 18

A process according to claim 9 wherein the solvent is water.

Claim 21

A method according to claim 17 further comprising an inorganic phosphate salt stabilizer present in an amount to deliver from about 0.05 to 0.30 grams per liter wash solution.

Claim 22

A method according to claim 18 wherein the phosphate salt is selected from the group consisting of tripolyphosphate, orthophosphate, pyrophosphate and mixtures thereof.

Claim 23

A method according to claim 17 wherein the peroxy compound is a sodium perborate salt.

Claim 24

A method according to claim 17 wherein the composition further comprises from 1 to 98% of laundry detergent adjuncts selected from the group consisting of surfactants, builders, fabric softeners, enzymes, inorganic fillers, colorants, lather boosters and mixtures thereof.