Concentrated heavy duty particulate laundry detergent

Abstract From the Canadian patent

A free flowing particulate heavy duty laundry detergent containing no more than 8.7% of phosphorus (from phosphate) is comprised of sodium tripolyphosphate particles having nonionic detergent in the interior and on the surface thereof, which adheres a coating of smaller particles of ionexchanging zeolite to the phosphate. Also within the invention is a method of making such a product by premixing spray dried sodium tripolyphosphate particles and smaller zeolite particles and admixing with them as by spraying, in liquid form, onto moving particles a normally liquid or pasty nonionic, detergent such as a higher fatty alcohol polyethylene oxide condensation product, which penetrates the sodium …