Detergent powders and process for preparing them

Details Detergent powders and process for preparing them Detergent powders and process for preparing them

C - Chemistry, Metallurgy

11

D

134/3.7

C11D 11/00 (2006.01) C11D 1/66 (2006.01) C11D 3/12 (2006.01) C11D 17/06 (2006.01)

Patent

CA 1321337

C.3243 US CLAIMS ABSTRACT A process for the preparation of a free-flowing detergent powder comprises the steps of (i) mixing a detergent base powder with finely divided zeolite in a weight ratio of the zeolite (hydrated basis) to the base powder of from 0.13:1 to 0.40:1, whereby the small zeolite particles are adhered to the outer surfaces of the larger base powder particles, and (ii) spraying a liquid composition comprising nonionic surfactant onto the mixture formed in step (i), at a weight ratio of nonionic surfactant to alkali metal aluminosilicate of at least 0.25:1. This improves flow properties, increases bulk density, and improves dispensing in an automatic washing machine.

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