Patent ID: 7008915
Filing Date: 2006-03-07
Classification: C11D

Abstract:
1. A process for reducing the density of dense, particulate, non-surfactant detergent ingredients from their initial density of about 1.7 g/cc, or greater, to a density of about 1.5 g/cc, or less, comprising the steps of: a) admixing said dense ingredients with water, a water-soluble binding agent and water-insoluble hollow microspheres, at a weight radio of said detergent ingredients: said microspheres in the range from about 1:10 to about 1:2, to form a pumpable fluid; b) dispersing the pumpable fluid from step (a) into a spray-dry tower as droplets; and c) evaporating the water from said droplets by contacting said droplets with hot air, said hot air being at an impinging temperature of at least about 200° C., to form hollow-core particles comprising said detergent ingredients coated on said microspheres.