Substituted silica sol

Details Substituted silica sol Substituted silica sol

1995-06-02

1997-06-17

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

2523156, 501 12, 502238, B01J 1300

Patent

active

056394128

ABSTRACT:
A method for producing high surface area, thermally stable, microporous porous ceramic materials involves replacing a portion of the silicon in a sol or gel comprising silica (silicon dioxide) with cations of another metal. The metal-substituted silica sols are dried and fired to yield porous ceramic materials. Similarly, metal-substituted gels are fired to yield porous ceramic materials. When compared with unsubstituted silica materials, the materials thus produced offer advantageous benefits including improved stability in a basic environment, enhanced thermal stability, and advantageous surface properties such as intrinsic negative charge.

REFERENCES:
patent: 2627933 (1953-02-01), Teter
patent: 2892797 (1959-06-01), Alexander et al.
patent: 3892580 (1975-07-01), Messing
patent: 3940912 (1976-03-01), Buchner
patent: 4151060 (1979-04-01), Isenberg
patent: 4158621 (1979-06-01), Swift et al.
patent: 4451388 (1984-05-01), Payne
patent: 4483694 (1984-11-01), Takamura et al.
patent: 4584280 (1986-04-01), Nanao et al.
patent: 4764357 (1988-08-01), Sherif et al.
patent: 4800051 (1989-01-01), Yan
patent: 4801399 (1989-01-01), Clark et al.
patent: 4888033 (1989-12-01), Charpin et al.
patent: 4902307 (1990-02-01), Gavalas et al.
patent: 4929406 (1990-05-01), Abe et al.
patent: 4981676 (1991-01-01), Minet et al.
patent: 5006248 (1991-04-01), Anderson et al.
patent: 5028568 (1991-07-01), Anderson et al.
patent: 5069794 (1991-12-01), Haag et al.
patent: 5104539 (1992-04-01), Anderson et al.
patent: 5108465 (1992-04-01), Bauer et al.
patent: 5110478 (1992-05-01), Haag et al.
patent: 5139540 (1992-08-01), Najjar et al.
patent: 5139541 (1992-08-01), Edlund
patent: 5160352 (1992-11-01), Najjar et al.
patent: 5160455 (1992-11-01), Clark et al.
patent: 5160713 (1992-11-01), Mazanec et al.
patent: 5162301 (1992-11-01), Reich et al.
patent: 5169576 (1992-12-01), Anderson et al.
patent: 5171449 (1992-12-01), Pasternak et al.
patent: 5183482 (1993-02-01), Najjar et al.
patent: 5194200 (1993-03-01), Anderson et al.
patent: 5196380 (1993-03-01), Shadman
patent: 5268101 (1993-12-01), Anderson et al.
patent: 5342431 (1994-08-01), Anderson et al.
Stober (Stoeber) et al., "Controlled Growth of Monodisperse silica spheres in the Micron Size Range", J. Colloid and Interface Science, 26, 62-69 (1968).
Chen, et al., "Sol-Gel Processing of Silica: 1. The Role of the Starting Compounds," J. Non-Crystalline Solids, 81:227-237 (1986).
Johnson, D.W., "Sol-Gel Processing of Ceramics and Glass," Am. Ceram. Soc. Bull., 64:1597-1602 (1985).
Kamiya, et al., "Preparation of TiO.sub.2 Fibers by Hydrolysis and Polycondensation of Ti(O-i-C.sub.3 H.sub.7).sub.4," J. Chem. Eng. Japan, 19:72-77 (1986).
Yoko, et al., "Photoelectrochemcial Properties of TiO.sub.2 Films Prepared by the Sol-Gel Method," Yogyo-Kyokan-Shi, 95:13-17 (1987).
Asaeda, et al., "Separation of Alcohol/Water Gaseous Mixtures by Thin Ceramic Membrane," J. Chem. Eng. Japan, 19:72-77 (1986).
Anderson, et al., "Titania and Alumina Ceramic Membranes," 39 J. Memb. Sci., 243-258 (1988).
Leenaars, A.F.M., et al., "The Preparation and Characterization of Alumina Membranes with Ultra-fine Pores. Part 1. Microstructural Investigations on Non-supported Membranes," J. Mater. Sci. 19:1077 (1984).
Leenaars, A.F.M., et al., "The Preparation and Chracterization of Alumina Membranes with Utlra-fine Pores. Part 3. The Permeability for Pure Liquids, " J. Membrane Sci. 24:245 (1985).
Leenaars, A.F.M., et al., "The Preparation and Characterization of Alumina Membranes with Ultra-fine Pores. Part 4. Ultrafiltration and Hyperfiltration Experiments," J. Membrane Sci. 24:261 (1985).
Leenaars, A.F.M., et al., "Porous Alumina Membranes," Chem Tech 560-564 (Sep. 1986).
Yoldas, B.E., "A Transparent Porous Alumina," Am. Ceram. Soc. Bull., 54:286-288 (1975).
Yoldas, B. E., "Alumina Sol Preparation from Alkoxides," Am. Ceram. Soc. Bull., 51:289-290 (1975).
Yoldas, B.E., "Preparation of Glasses and Ceramics from Metal-Organic Compounds," J. Mater. Sci., 12:1203-1208 (1977).

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