Process for making a titanium dioxide concentrate

Abstract From the Canadian patent

The disclosure relates to a process for a making titanium dioxide concentrate by removing iron from material containing titanium oxide and iron oxides with the aid of a chlorine-containing gas. To this end, the material containing titanium oxide is kept under agitation and reacted inside a reaction zone heated to 800 to 1300°C with chlorine gas containing at most 30 volume % inert gas. Resulting iron(III) chloride becomes volatilized and a material consisting substantially of titanium dioxide remains behind More particu-, larly, the material containing titanium oxide is allowed to travel downwardly under the action of gravity and contacted countercurrently with the chlorine gas or it is …