Patent ID: 7871974
Filing Date: 2011-01-18
Classification: C11D

Abstract:
1. A process for making bleach granules comprising the steps of: pre-mixing solid components and a bleach selected from the group comprising: (1) diacyl peroxide of the general formula: where R 1 represents a C 6 -C 18 alkyl group and R 2 represents an aliphatic group compatible with a peroxide moiety, such that R 1 and R 2 together contain a total of 8 to 30 carbon atoms; (2) tetraacyl peroxide of the general formula: where R 3 represents a C 1 -C 9 alkyl group and n represents an integer from 2 to 12; and (3) mixtures thereof; to form a homogeneous mixture; compressing the homogeneous mixture to form a compacted homogeneous mixture; cooling the homogenous mixture during compression with a cooling agent; comminuting the compacted homogeneous mixture to a bleach granule comprising a desired particle size; wherein the temperature of the process is such that the bleach does not rise above about 10° C.; wherein the process does not include a heating step; and wherein said mixture is free of a binder.