Patent ID: 8013204

Claim:
A method for the separation, concentration and desiccation of solid matter capable of being dispersed in a liquid, by providing a delayed reactivity partly prehydrated quicklime (DRQL), which is composed of two essential components, CaO and Ca(OH) 2 and is associated with at least one metal salt, wherein said metal salt is a Fe 3+ salt or an Al 3+ salt, the DRQL is arranged in such a way that, in the presence of water, a reaction (1) between the water and the quicklime (CaO): CaO+H 2 O→Ca(OH) 2 (1) is temporarily delayed by hydrated lime Ca(OH) 2 , wherein the hydrated lime of the DRQL flocculates or concentrates the solid matter before separation, and the quicklime of said DRQL desiccates said solid matter during or after said separation.