Preparation of bleach catalyst aggregates of manganese cation impregnated aluminosilicates by high velocity granulation

Claim 1

A process for the preparation of bleach catalysts in aggregate form, exclusive of any peroxide compound within the aggregate, comprising the steps of: (i) adsorbing a manganese (II) cation onto an aluminosilicate support material having an average diameter size of about 2 to 10 microns, the ratio of manganese (II) cations to aluminosilicate ranging from about 1:1000 to 1:10, the combined weight of manganese (II) cation and aluminosilicate support material being from 1 to 99% of the total catalyst; (ii) granulating a wet mass by subjecting aggregates of said wet mass to collisions having a velocity greater than I0 meters/sec said wet mass comprising aluminosilicate support material, with manganese (II) cations adsorbed thereon, in the presence of from about 0.1 to 40% of a binder, the amount based on a dry solids weight content of the total aggregate, and wherein neither the aggregates nor their components have a pH of more than 10; and (iii) drying the resultant aqqreqates and wherein at least 70% of said dried aggregates have a diameter size ranging from at least 250 to about 2000 microns.