Titanium dioxide manufacture via the chloride process Tamil revision mind map with four branches: the rutile ore raw material, step one chlorination of rutile with coke and chlorine gas at 950 degrees Celsius to form titanium tetrachloride which is distilled since its boiling point is 137 degrees Celsius, step two oxidation of purified titanium tetrachloride back to pure titanium dioxide with the chlorine gas recycled to step one, and the use of the resulting white chemically inert pigment in paints, plastics, paper and toothpaste.