A PROCESS FOR PREPARING AN ACTIVATED MINERAL

摘要

The invention provides a process for the activation of a magnesium or calcium sheet silicate hydroxide mineral comprising: (a) preheating magnesium or calcium sheet silicate hydroxide mineral particles to obtain preheated silicate hydroxide mineral particles; (b) activating the preheated silicate hydroxide mineral particles at elevated temperature to obtain at least hot activated mineral particles; and (c) cooling the hot activated mineral particles, wherein energy released during cooling in step (c) is used for preheating the magnesium or calcium sheet silicate hydroxide mineral particles in step (a) by heat-integration. The invention further provides an activated magnesium or calcium sheet silicate hydroxide mineral and a process for sequestration of carbon dioxide.