Titanium dioxide having a variable sintering stability

Details Titanium dioxide having a variable sintering stability Titanium dioxide having a variable sintering stability

2010-05-24

2011-12-06

Silverman, Stanley (Department: 1736)

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C423S610000, C423S611000, C423S612000

Reexamination Certificate

active

08071070

ABSTRACT:
Provided is a crystalline TiO2powder in the form of aggregated primary particles having a variable sintering stability at a BET surface area of 70-100 m2/g and a rutile content of greater than 10% but less than or equal to 40%, and a process for preparing the crystalline TiO2powder, which involves: introducing a TiCl4vapor and, separately therefrom, H2and a primary air into a mixing chamber to produce a gaseous mixture; igniting the gaseous mixture in a burner to produce a flame, which is burned into a reaction chamber to produce the crystalline TiO2powder and gaseous substances; and separating the crystalline TiO2powder from the gaseous substances, wherein the relative amounts of TiCl4vapor, H2and primary air are selected to provide crystalline TiO2powder having the aforementioned BET surface area and rutile content, with the proviso that factor A has a value of 0.1-0.4 g/m2in accordance within the following formula: factor A=105{[(TiCl4vapor×H2)/(amount of air×gaseous mixture)]/BET]}.

REFERENCES:
patent: 5861132 (1999-01-01), Pratsinis et al.
patent: 10 2004 055 165 (2005-06-01), None
patent: 1 243 555 (2002-09-01), None
patent: 1 354 854 (2003-10-01), None
patent: 10-251021 (1998-09-01), None
patent: 2005054136 (2005-06-01), None
Bacsa, et al., “Effect of rutile phase on the photocatalytic properties of nanocrystalline titania during the degredation ofp-coumaric acid”, Applied Catalysis B: Environmental, vol. 16, pp. 19-29, 1998.
Akurati, et al., “Synthesis of non-aggregated titania nanoparticles in atmospheric pressure diffusion flames”, Powder Technology, Elsevier Sequoia, vol. 165, pp. 73-82, 2006.
Pratsinis, Sotiris E., “The role of gas mixing in flame synthesis of titania powders”, Power Technology 86 (1996), pp. 87-93.

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