Oxide products formed from calcined carbonate powder for use as biocide, chemical detoxifier and catalyst support products

A reaction apparatus for producing a biocide powder or a chemical detoxifier powder or a catalyst support from a carbonate mineral, comprising:

• a. a grinder for carbonate minerals;
• b. an externally heated counterflow flash calciner that produces high surface area oxides from the ground carbonate;
• c. a second reaction vessel having an inlet for caustic calcined carbonate powder and a water inlet;
• d. a shearing apparatus for shearing the reaction mixture;
• e. a steam outlet for release of steam from the reaction vessel, such that, in use, the reaction is controlled by allowing heat of hydration to raise the temperature of the reaction mixture, allowing water to boil off from the reaction mixture as hydration proceeds, and removing steam via the steam outlet to remove excess heat and control the reaction temperature at a boiling point;
• f. a means of quenching the slurry to below 60° C.;
• g. a means of cooling the slurry to ambient temperature;
• h. a means of adding solid or liquid additives to the slurry;
• and
• i. a means of sparging the slurry with ozone.