gravimetric analysis of titanium dioxide suppliers

To make up the batch of lithopone the solution containing the original 1050 pounds of barium sulphide and 856 pounds of titanium acid cake is added to sufiicient zinc sulphate solution of approximately 35 Baum at 60 Centigrade to completely precipitate all the BaS as zinc sulphide and barium sulphate so that the final precipitate contains a suspen-. sion of co-p'recipitated zinc sulphide barium sulphate intimately mixed with a suspension of titanium oxide. On the completion of the reaction, shown by the complete absence of either soluble zinc or barium in a filtered por-.

...

The production of lithopone is associated with several environmental concerns, including air and water pollution. Zinc sulfide ore mining can lead to soil erosion and habitat destruction, while sulfuric acid leaching and calcination processes can release pollutants into the air and water. To address these issues, many Chinese lithopone factories have implemented environmental protection measures such as wastewater treatment and emission reduction technologies.

...

That came after a 2021 report from an expert panel at the European Food Safety Authority, which reviewed data on titanium dioxide safety. The panel said it couldn’t rule out concerns that the food additive might be able to damage DNA and possibly lead to cancer. They explained that after you eat something that has titanium dioxide in it, your body absorbs low levels of its particles – but the particles can build up as you eat more foods with this additive.

...

One of the key benefits of using R-906 rutile TiO2 is its ability to improve the overall quality of printed materials. By providing excellent whiteness and opacity, R-906 enhances the visual appeal of printed products, making them more eye-catching and professional-looking. Additionally, the chemical stability of R-906 ensures that printed materials maintain their color and appearance even under harsh environmental conditions, such as high humidity and exposure to sunlight.

...