Sulfate Process

The following diagram shows the sulfate process for producing KRONOS titanium dioxide pigments. Often referred to as the "old process", relative to the more modern chloride process, KRONOS uses the sulfate process to produce high-quality titanium dioxide pigment grades for the coating, ink, fiber and paper industries. KRONOS was granted original patents for the sulfate process and has been producing titanium dioxide pigments using this process continuously since 1916. Since the second half of the 1960s, KRONOS has also manufactured titanium dioxide grades using the chloride process.