Patent ID: 6121229
Filing Date: 2000-09-19
Classification: C11D

Abstract:
A non-tower process for preparing a granular detergent composition having a density of at least about 600 g/l, comprising the steps of:(a) dispersing a surfactant, and coating the surfactant with fine powder having a diameter from 0.1 to 500 microns, in a first mixer wherein conditions of the mixer include (i) from about 2 to about 50 seconds of mean residence time, (ii) from about 4 to about 25 m/s of tip speed, and (iii) from about 0.15 to about 7 kj/kg of energy condition, wherein first agglomerates are formed;(b) spraying finely atomized liquid onto the first agglomerates in a second mixer wherein conditions of the mixer include (i) from about 0.2 to about 5 seconds of mean residence time, (ii) from about 10 to about 30 m/s of tip speed, and (iii) from about 0.15 to about 5 kj/kg of energy condition, wherein second agglomerates are formed; and(c) thoroughly mixing the second agglomerates in a third mixer wherein conditions of the mixer include (i) from about 0.5 to about 15 minutes of mean residence time and (ii) from about 0.15 to about 7 kj/kg of energy condition.