Figure 2. Simplified process diagram showing key steps in the chloride process for production of refined TiO2

In the continuous process shown in Figure 2, crude TiO2-containing minerals are reacted with Cl2 in the presence of coke (carbon) at 800–1200°C to produce titanium tetrachloride (TiCl4), a liquid compound that is then distilled to yield high purity TiCl4.