| 摘要 |
<p>The present invention relates to a process for preparing a solid laundry detergent composition comprising: (a) anionic detersive surfactant; (b) from 0% to less than 5%, by weight of the composition, of zeolite builder; (c) from 0% to less than 5%, by weight of the composition, of phosphate builder; and (d) optionally, from 0% to less than 5%, by weight of the composition, of silicate salt; wherein the process comprises the steps of: (i) preparing an aqueous mixture comprising an anionic detersive surfactant; (ii) subjecting the aqueous mixture to a first drying step having a mean drying-duration time of less than 60 seconds and a mean drying rate of from 0.005 to 0.030kg of water per kg of aqueous mixture per second to form a partially dried aqueous mixture; and (iii) subjecting the partially dried aqueous mixture to a second drying step having a mean drying-duration time of at least 10 seconds and a mean drying rate of from 0.0005 to less than 0.030kg of water per kg of partially dried aqueous mixture per second to form a solid laundry detergent composition, wherein the ratio of the mean drying rate in the first drying step to the mean drying rate in the second drying step is greater than 1:1, and wherein the ratio of the mean drying-duration time of the second drying step to the mean drying-duration time of the first drying step is greater than 1:1.</p> |
