A SPRAY-DRYING PROCESS

摘要

The present invention relates to a process for preparing a spray-dried detergent powder comprising (i) detersive surfactant; and (ii) other detergent ingredients; wherein the process comprises the steps of: (a) forming an aqueous detergent slurry in a mixer; (b) transferring the aqueous detergent slurry from the mixer through at least one pump to a spray nozzle; (c) contacting alkoxylated anionic detersive surfactant and/or acid precursor thereof to the aqueous detergent slurry after the mixer and before the spray nozzle to form a mixture; (d) spraying the mixture through the spray nozzle into a spray-drying tower; and (e) spray-drying the mixture to form a spray-dried powder.