Process for making inorganic gels

Details Process for making inorganic gels Process for making inorganic gels

1993-09-29

1995-08-15

Chaudhuri, Olik

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

502233, 2523156, C01B 3312

Patent

active

054417180

ABSTRACT:
A process for making inorganic gels by reaction of tetraalkoxy orthosilicates, tetraalkoxy titanates and tetraalkoxy zirconates with strong carboxylic acids. Water need not be present initially as a reactant. Optically clear, very small pore size, narrow pore size distribution, and high specific area inorganic gels useful for abrasion-resistant coatings, optical applications, catalyst or enzyme support, gas separation, or chromatography packing are thus produced.

REFERENCES:
patent: 4941993 (1990-07-01), Strehlow et al.
patent: 4954327 (1990-09-01), Blount
patent: 4961767 (1990-10-01), Schemerhorn et al.
Sumio Sakka, Hiromitsu Kozuka and Sai-Hun Kim, Various Factors Affecting the Conversion of Silicon Alkoxide Solutions to Gels, Ultrastructure Processing of Advanced Ceramics, pp. 159-171, 1988.
Bradley K. Coltrain, Sharon M. Melpolder and John M. Salva, Effect of Hydrogen Ion Concentration on Gelation of Tetrafunctional Silicate Sol-Gel Systems, Ultrastructure Processing of Advanced Materials, pp. 69-76, 1992.

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