Agglomeration process for making granular detergents

摘要

Agglomerated granular detergent compositions containing at least about 10% sodium tripolyphosphate on an anhydrous basis and from 4% to 20% of an alkoxylated nonionic surfactant are prepared by spraying on or otherwise adding an aqueous sodium silicate solution as an agglomerating agent. The rate of hydration of the sodium tripolyphosphate and the degree of agglomeration of the granular detergent composition is controlled by addition of a portion of the total surfactant to one or more dry ingredients other than a major part of the sodium tripolyphosphate and the addition of another portion of the surfactant to the major part of the sodium tripolyphosphate concurrent with or subsequent to the addition of the agglomerating agent to the sodium tripolyphosphate.