PRODUCTION OF DETERGENT GRANULATES

摘要

A process of forming granular detergent products is effected in a gas fluidisation granulator. A fluidised particulate solid material is contacted with a spray of liquid binder. The excess velocity (Ue) of fluidisation gas relative to the mass or volume flux of the spray (a) or (b) when determined at the normalised nozzle-to-bed distance (D0) is set so that the flux number (FNm or FNv) as determined by (i) or (ii) (where p is the particle density) is at a critical value of at least 2 for at least 30 % of the process. Fine particulates may be extracted during granulation and re-introduced to the process to act as a flow aid or layering agent.