Manufacture of coated particulate detergents

摘要

A process to manufacture large coated detergent particles having perpendicular dimensions x, y and z, wherein x is from 0.2 to 2 mm, y is from 2.5 to 8 mm, and z is from 2.5 to 8 mm the particles being substantially the same shape and size as one another and the uncoated core particles comprising at least 50 wt % of soluble surfactant, the process comprising the steps of suspending uncoated core particles in a fluidized bed and spraying onto the core particles an aqueous slurry of sodium carbonate in admixture with 0.6 to 3 wt % sodium carboxy methyl cellulose and drying to form the coated particles.

主权项

1. A process to manufacture coated detergent particles having a core and a coating, the coated detergent particles having perpendicular dimensions x, y and z, wherein x is from 0.2 to 2 mm, y is from 2.5 to 8 mm, and z is from 2.5 to 8 mm, and the uncoated core particles comprising at least 50 wt % of a soluble surfactant, the process comprising the steps of suspending uncoated core particles in a fluidised bed and spraying onto the core particles an aqueous slurry in which the slurry is sprayed at a temperature of at least 35° C., the aqueous slurry comprising: sodium carbonate in admixture with 0.6 to 3 wt % sodium carboxy methyl cellulose and drying to form the coated particles.