SPRAY DRYING METHOD FOR PREPARING SPRAY DRIED DETERGENT POWDER WITH LOW DENSITY, LOW CONTENT OF DETERGENT COMPONENT AND HIGH WATER-SOLUBILITY Russian patent published in 2011 - IPC C11D11/00 

FIELD: chemistry.

SUBSTANCE: method involves the following steps: preparing an aqueous suspension containing water and a non-aqueous substance; and spraying the suspension into a spray-drying tower, the temperature of the suspension when sprayed into the spray-drying tower lying between 65°C and 140°C, and air temperature at the outlet of the spray-drying tower lying between 70°C and 120°C. The non-aqueous substance contains an inorganic component and an organic component, and weight ratio of the inorganic component to that of the organic component lies between 0.3:1 and 5:1, where the non-aqueous substance contains an anionic surfactant, polymeric carboxylate and carbonate salt. All components are taken in a defined ratio.

EFFECT: invention enables to obtain detergent powder for laundry with low content of the detergent component and improved water-solubility at low temperatures.

8 cl, 4 tbl, 2 ex