Description
Automotive Refinish
Titanium Dioxide pigments produce a high tinting strength, neutral or slightly blue undertone in the pigmentated system. The high reflectivity in the wavelength range of the visible light and their high scattering capacity in the lacquer formulations are other important features. Effective surface treatment leads to high electrostatic stability in various environments at high technical concentrations, which leads excellent product stability. Rutile qualities with higher inorganic surface treatment suppresses decomposition processes of the binder initiated by UV radiation and other weathering influences. This leads to an increase of durability with respect to chalking resistance and glossy posture.
Chloride process:
- Raw materials: Uses high-grade ores like natural or synthetic rutile.
- Process: Reacts the ore with chlorine gas and petroleum coke at high temperatures to form titanium tetrachloride (๐๐๐ถ๐4) gas, which is then purified and oxidized to produce pure TiO2.
- Product: Produces a higher-purity rutile pigment with superior whiteness and opacity.
- Process type: A newer, continuous process.
- Environmental impact: Generates hazardous waste (๐๐๐ถ๐4 and ๐ถ๐2) but includes options for chlorine recovery and recycling, making it a more efficient and potentially more environmentally friendly option.
Key differences at a glance
| Featureย | Sulfate Process | Chloride Process |
|---|---|---|
| Purity | Lower | Higher |
| Product | Anatase and Rutile | Rutile only |
| Raw Material | Lower-grade ores | High-grade ores |
| Process Type | Batch | Continuous |
| Energy | Higher energy consumption | Lower energy consumption |
| Initial Cost | Lower | Higher |
| Waste | Higher waste generation | Lower waste, but requires chlorine recovery |
