Detergent slurry process

Claim 1

A process for preparing a heat-dried built detergent composition containing sodium tripolyphosphate hexahydrate crystals of a size not exceeding 100 Mu which comprises forming substantially homogeneous dispersion of anhydrous sodium tripolyphosphate in water at a temperature between 0* C. to about 15* C. without appreciable hydration occurring by blending the anhydrous sodium tripolyphosphate in powder form with water containing up to about 30 percent of sodium silicates using intensive stirring provided by a disc-rotor pump at the point of their first contact, allowing said dispersion of sodium tripolyphosphate to hydrate to the hexahydrate in said temperature range to form a slurry and thereafter mixing an organic surface active agent with the slurry and spray-drying said slurry;