Titanium dioxide, a process for its production and its use

Details Titanium dioxide, a process for its production and its use Titanium dioxide, a process for its production and its use

C - Chemistry, Metallurgy

01

G

6/207, 261/22, 2

C01G 23/047 (2006.01) C01G 23/053 (2006.01) C03C 1/04 (2006.01) C03C 8/12 (2006.01)

Patent

CA 2003935

TITANIUM DIOXIDE, A PROCESS FOR ITS PRODUCTION AND ITS USE ABSTRACT OF THE DISCLOSURE A titanium dioxide composition useful as the opacifier agent for vitreous enamels and fusion enamels comprises TiO2 in an amount of at least 87% by weight, a sulfate content of 0.45% or less by weight based on TiO2, an alkali oxide content of less than 0.5% by weight based on TiO2, a water content of less than 12% by weight based on TiO2, a BET surface of 30 to 500 m2/g, an apparent density of 0.2 to 0.8 kg/l, a primary particle size of 0.005 to 0.1 µm and a mean aggregated grain size of 30 to 500 µm and wherein the TiO2 is in amorphous form or the crystalline anatase form or a mixture of both, and the composition is prepared by adjusting an acidcontaining titanium dioxide hydrate to pH 7-13 with a base, which is then filtered and washed, and the resulting product is then spray-dried.

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