| 摘要 |
<p>A moisture and odour absorbing composition suitable for use as animal litter, has a core comprising activated carbon surrounded by a porous, coherent and mechanically resistant outer layer having a lower carbon content than the core. The composition may be made by preparing granules of a composition comprising inorganic and carbonaceous components and heating the granules until carbon or carbonaceous material in an outer layer of the granules is combusted or otherwise wholly or partly removed and any carbonisable material in the interior of the granules is carbonised and recovering the product having an activated carbon core.</p> |
