| 摘要 |
The present invention relates to a spray-drying process to prepare a spray-dried powder comprising: (a) anionic detersive surfactant; (b) from 0wt% to 10wt% zeolite builder; (c) from 0wt% to 10wt% phosphate builder; (d) optionally from 0wt% to 10wt% silicate salt; (e) optionally carbonate salt; (f) optionally polymeric material; and (g) optionally from 0wt% to 10wt% water, wherein, the process comprises the steps of: (i) spraying an aqueous slurry comprising: from (a) anionic detersive surfactant; (b) from 0wt% to 20wt% zeolite builder; (c) from 0wt% to 20wt% phosphate builder; (d) optionally from 0wt% to 20wt% silicate salt; (e) optionally carbonate salt; (f) optionally polymeric material; and (g) water, into a spray-drying zone, wherein the spray-drying zone is under negative pressure and wherein the air inlet air temperature into the spray-drying zone is greater than 150°C; and (ii) drying the aqueous slurry to form a spray-dried powder.
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