| 摘要 |
<p>A process for the preparation of detergent powder of high bulk density comprises neutralising a detergent acid (anionic surfactant precursor), eg linear alkylbenzene sulphonic acid, by gradually adding it to a particulate solid water-soluble alkaline inorganic material, for example, sodium carbonate (optionally plus other alkaline materials, detergency builders etc), in a high-speed mixer/granulator, eg Fukae mixer, and granulating the product in the mixer in the presence of a liquid binder. The liquid to solid ratio is kept low throughout the neutralisation step, so that the reaction mixture remains in particular form throughout the process.</p> |
