Titanium Oxide (TiO2) Pigment Production Process Analysis

Application Summary

Analysis Point Analyte Typ. Range Suitable Analyzer
TiCl4 Feed vanadium 0-5 ppm OMA Process Analyzer
Recycle Gas TiCl4 0-10,000 ppm OMA Process Analyzer

Measuring Titanium Tetrachloride in TiO2 Pigment Production

Known in the paint industry as the "whitest white," titanium dioxide is a pigment used worldwide. In the chloride production method, titanium ore is converted to TiCl4, from which metallic chloride impurities are discarded. Oxidation of purified TiCl4 yeilds bright, finish-ready TiO2.

There are 2 critical points of analysis in this production process:

(1) The incoming stream of TiCl4 needs to be pure to yeild high quality TiO2. This requires verification that the TiCl4 feed is free of incident vanadium.

(2) The waste/recycle gas stream should be free of TiCl4 if the process is running efficiently. The presence of TiCl4 at this stage indicates incomplete hydrolysis and waste of valuable raw materials.

The OMA TiCl4 and Vanadium Analyzer is the ideal instrument for both analysis points, as TiCl4 and vanadium each have distinct, strong absorbance curves in the UV wavelength range. Dispersive analysis is absolutely necessary; collateral data is needed to differentiate the absorbance of TiCl4 from the absorbance of chlorine in the gas stream.

Measuring Vanadium in TiO2 Pigment Production