Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2011-08-16
2011-08-16
Mayes, Melvin C (Department: 1732)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S339000, C423S335000, C502S350000, C502S325000, C502S305000
Reexamination Certificate
active
07998453
ABSTRACT:
The disclosure pertains to a process for making a suspension of finely divided titanium (IV) oxide particles, comprising:vigorously mixing(a) a volume of a first component comprising a major proportion of an alcohol, a minor proportion of a titanium alkoxide and a minor proportion of a titanium alkoxide activator selected from the group consisting of water and a first aqueous base, and(b) a volume of a second component selected from the group consisting of water and a second aqueous base,at least one of the first component or the second component having a base therein, the second component being substantially free of alcohol, to form a mixture comprising a suspension of finely divided titanium (IV) oxide particles, the mixture having a water to titanium molar ratio ranging from about 40 to about 1 to about 5000 to about 1,wherein the proportion of the titanium alkoxide, the proportion of the activator, the mixing vigor, and a ratio of the volume of the first component to the volume of the second component are effective for the suspension of the finely divided particles to form in the mixture.The suspensions can be dried to recover a powder. Typically the particles are nanoparticles.
REFERENCES:
patent: 4861572 (1989-08-01), Sugoh et al.
patent: 5607994 (1997-03-01), Tooley et al.
patent: 5631310 (1997-05-01), Tooley et al.
patent: 5889090 (1999-03-01), Tooley et al.
patent: 5959004 (1999-09-01), Tooley et al.
patent: 6576589 (2003-06-01), Na et al.
patent: 0275688 (1992-03-01), None
patent: 1987-278125 (1987-12-01), None
patent: 1989-133939 (1989-05-01), None
patent: 1989-133940 (1989-05-01), None
patent: 1993-24865 (1993-04-01), None
patent: 2001-246247 (2001-09-01), None
patent: WO2008/079311 (2008-07-01), None
Synthesis and Photocatalytic Activity of Mesoporous Anatase Prepared From Tetrabutylammonium-Titania Composites. By Saadoun et al.Materials Research Bulletins 35 (2000) 193-202.
The Growth Kinetics of TiO2 Nanoparticles From Titanium (IV) Alkoxide at High Water/Titanium Ratio. By Gerko Oskam et al. J Phys. Chem. 2003, 107. 1734-1738.
Saadoun L et al; “Synthesis and Photocatalytic Activity of Mesoporous Anatas Prepared From Tetraabutylammonium-Titania Composites” Materials Research Bulletin 35 (2000) 193-202.
Oskam et al; The Growth Kinetics of TiO2 Nanoparticles From Titanium (IV) Alkoxide at Hight Water/Titanium Ratio, J. Phys.Chem B 2003, 107, 1734-1738.
International Search Report Jun. 2, 2008.
Gustav Mie, Annalen Der Physik 25:3770445 (1908).
B. Karunagaran et al., Cryst.Res.Technol. 38:773-778 (2003).
Grushin Vladimir
Scott David M
Torardi Carmine
E.I. Du Pont de Nemours and Company
Mayes Melvin C
Nguyen Colette
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