Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2005-02-08
2005-02-08
Bos, Steven (Department: 1754)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C106S437000
Reexamination Certificate
active
06852306
ABSTRACT:
The present invention relates to a process for making durable titanium dioxide pigment by vapor phase deposition of surface treatments on the titanium dioxide particle surface by reacting titanium tetrachloride vapor, an oxygen containing gas and aluminum chloride in a plug flow reactor to form a product stream containing titanium dioxide particles; and introducing silicon tetrachloride into the reactor at a point down stream of the point where the titanium tetrachloride and oxygen were contacted and where at least 97% of the titanium tetrachloride has been converted to titanium dioxide or where the reaction temperature is no greater than about 1200° C., and preferably not more than about 1100° C.
REFERENCES:
patent: 3219468 (1965-11-01), Evans et al.
patent: 3364048 (1968-01-01), May
patent: 3409501 (1968-11-01), Siuta
patent: 3512219 (1970-05-01), Stern et al.
patent: 3767455 (1973-10-01), Claridge et al.
patent: 3856929 (1974-12-01), Angerman et al.
patent: 3928057 (1975-12-01), Decolibus
patent: 4050951 (1977-09-01), Piccolo et al.
patent: 4075031 (1978-02-01), Allen
patent: 4214913 (1980-07-01), Glaeser
patent: 4552593 (1985-11-01), Ostertag
patent: 4927464 (1990-05-01), Cowie
patent: 5562764 (1996-10-01), Gonzalez
patent: 5599519 (1997-02-01), Haddow
patent: 5728205 (1998-03-01), Allen et al.
patent: 5730795 (1998-03-01), Herkimer
patent: 5753025 (1998-05-01), Bettler et al.
patent: 5922120 (1999-07-01), Subramanian et al.
patent: 0 032 426 (1981-01-01), None
patent: 0430424 (1991-06-01), None
patent: 689123 (1950-10-01), None
patent: WO8911450 (1989-11-01), None
patent: WO9600699 (1996-01-01), None
patent: WO9606803 (1996-03-01), None
patent: 9636441 (1996-11-01), None
patent: WO9853908 (1998-12-01), None
patent: WO9932562 (1999-07-01), None
patent: WO0020516 (2000-04-01), None
Quint H. Powell, George P. Fotou, and Toivo T. Kodas, Synthesis of Alumina-and Alumina/Silica-Coated Titania Particles in an Aerosol Flow Reactor, Chem. Meter., 9, 685-693, 1997, no month.
Sanjeev Jain, George P. Fotou and Tovio T. Kodas, A Theoretical Study on Gas-Phase Coating of Aerosol Particles, Journal of Colloid and Interface Science, 185, 26-38, 1997, Article CS964558, no month.
William G. French, Laurel J. Pace and Victoria A. Foertmeyer, Chemical Kinetics of the Reactions of SiCI4, GeCI4, POCI3and BCI3, with Oxygen, The Journal of Physical Chemistry, 82, No. 20, 2191-2194, 1978, no month.
Sotiris E. Pratsinis, Hebi Bai and Pratim Biswas, Kinetics of Titanium(IV) Chloride Oxidation, Jounral of the American Ceramic Society, 73, No. 7, 2158-62, 1990, no month.
Quint H. Powell, George P. Fotou and Toivo T. Kodas, Gas-Phase Coating of TiO2with SiO2in a Continuous Flow Hot-Wall Aerosol Reactor, J. Mater. Res., 12, No. 2, 552-559, Feb. 1997.
D.R. Powers, Kinetics of SiCI4Oxidation, J. Am. Ceram. Soc., 1978, vol. 61, No. 7-8, pp. 295-297, no month.
Diemer, Jr. Russell Bertrum
Gai Pratibha Laxman
Subramanian Narayanan Sankara
Bos Steven
E. I. du Pont de Nemours and Company
LandOfFree
Process for making durable rutile titanium dioxide pigment... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for making durable rutile titanium dioxide pigment..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for making durable rutile titanium dioxide pigment... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3450339