Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Silicon containing or process of making
Reexamination Certificate
2005-10-18
2005-10-18
Wood, Elizabeth D. (Department: 1755)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Silicon containing or process of making
C502S232000, C502S233000, C502S234000, C502S237000, C502S239000, C502S242000, C502S349000, C502S350000, C423S610000, C423S701000, C423S702000, C423S705000, C423S713000, C106S436000, C501S134000
Reexamination Certificate
active
06956006
ABSTRACT:
The invention relates to a composite material comprising silicon and titanium dioxide characterized by an enhanced thermal and hydrothermal stability of the pore structure. The composite is obtainable by precipitating titanium hydroxide from an aqueous solution containing sulfate salts and urea, followed by an hydrothermal treatment in the mother liquor, and by reacting the precipitate with a basic silica sol. The composite has a specific surface area of up to 228 m2/g for a material calcined at 800° C. for 3 hours, and is suitable for catalyzing a variety of reactions, including Claus reaction and degradation of organic impurities.
REFERENCES:
patent: 3887494 (1975-06-01), Dietz
patent: 4081510 (1978-03-01), Kato et al.
patent: 4176089 (1979-11-01), Cull
patent: 4388149 (1983-06-01), Kimmerle et al.
patent: 4388288 (1983-06-01), Dupin et al.
patent: 4422958 (1983-12-01), Dupin
patent: 4422960 (1983-12-01), Shiroto et al.
patent: 4537873 (1985-08-01), Kato et al.
patent: 4876372 (1989-10-01), Nakanishi et al.
patent: 4929586 (1990-05-01), Hegedus et al.
patent: 4977127 (1990-12-01), Rikimaru et al.
patent: 5120701 (1992-06-01), Brand et al.
patent: 5162283 (1992-11-01), Moini
patent: 5175136 (1992-12-01), Felthouse
patent: 5371056 (1994-12-01), Leyrer et al.
patent: 5389309 (1995-02-01), Lopez
patent: 5451390 (1995-09-01), Hartmann et al.
patent: 5672330 (1997-09-01), Hartmann et al.
patent: 5703272 (1997-12-01), Abe et al.
patent: 5718878 (1998-02-01), Zhang
patent: 0311515 (1989-04-01), None
patent: 0668100 (1995-08-01), None
patent: 0722905 (1996-07-01), None
patent: 0826410 (1998-03-01), None
patent: 0826410 (1998-03-01), None
patent: WO 96/09117 (1996-03-01), None
patent: WO 99/39825 (1999-08-01), None
Notari, B., “Microporous Crystalline Titanium Silicates,”Advances in Catalysis, 41:253-327 (1996).
Swain, J.E., et al. , “Characterization of titania surface area in titania/silica SCR catalysts by temperature-programmed reaction of 2-propanol,”Applied Catalysis A: General, 139:175-187 (1996).
Ko, E. I., et al., “A Study of Acidic Titania/Silica Mixed Oxides and Their Use as Supports for Nickel Catalysts,”Journal of Catalysis, 105:511-520 (1987).
Dutoit, D. C. M., et al., “Titania-Silica Mixed Oxides, I. Influence of Sol-Gel and Drying Conditions on Structural Properties,”Journal of Catalysis, 153:165-176 (1995).
Hutter, R., et al. , “Titania-Silica Mixed Oxides, II. Catalytic Behaviour in Olefin Expoxidation,”Journal of Catalysis, 153:177-189 (1995).
Gorlova Marina N
Mirsky Yaacov W.
Hamilton Brook Smith & Reynolds P.C.
Rotem Amfert Negev Ltd.
Wood Elizabeth D.
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