| 摘要 |
The present invention relates to a process for making a free flowing granular detergent comprising: mixing an effective amount of an aqueous surfactant paste having a detergency activity of at least 40 % and an effective amount of a dry detergency powder, said surfactant paste active and builder or powder having a ratio of 0.05:1 to 19:1 to form a mix; rapidly forming a uniform mixture from said mix at a temperature of from about 0 DEG C to about 80 DEG C; granulating said mixture into discrete detergent granules using a high speed mixing at a tip speed of about 5-50 m/sec; and wherein said surfactant paste is comprised of at least one anionic surfactant, and wherein said mixing and granulating are conducted simultaneously, or immediately sequentially. The nil-surfactant components of the finished granular detergent other than the granulated active paste, comprise a (relatively small) part of the total amount of builder, another part of the builder having been used for granulation. The nil active components can be spray-dried to form a powder having good color, frangibility, dissolution properties and desirable density and size characteristics for direct dry mixing with other ingredients of the finished granular detergent. |
