Patent ID: 7947642

Claim:
A spray-drying process for the preparation of a spray-dried detergent powder having a bulk density of from about 50 g/l to about 325 g/l comprising: (a) preparing an aqueous slurry suitable for spray-drying comprising from about 30 wt % to about 60 wt % water and from about 40 wt % to about 70 wt % non-aqueous material comprising an anionic surfactant, a polymeric carboxylate and a carbonate salt; and (b) spraying the slurry into a spray-drying tower at a pressure in the range of from about 5.0×10 6 Nm −2 to about 7.0×10 6 Nm −2 ; wherein said spray-dried detergent powder contains from 35.7 to 70 wt % of said anionic surfactant and at least 5 wt % of said polymeric carboxylate; and wherein said spray-dried detergent powder is essentially free from zeolite and silicate salt.