| abstract |
The present invention relates to a process for preparing laundry powder detergents having excellent fluidity, solubility and anti-caking property and further having a broad bulk density of 0.3-1.2g/ml, which process comprises supplying a liquid material and a powder material into the outlet and/or the other portion of an air lifter in which one or more continuous and/or batch mixer are mounted with an agitating shaft having an agitating fan, subjecting to a granulation or reaction and granulation of the supplied materials to form a powder of a detergent composition, supplying the powder into the outlet and/or the inner portion of the air lifter to pass them in the opposite direction to the air flow of the air lifter under appropriate temperatue and lift pressure, and then carrying out further granulation and surface modification. |