C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
C03B 19/12 (2006.01) B01J 13/00 (2006.01) C01B 33/158 (2006.01) C03B 37/016 (2006.01) C03C 1/00 (2006.01) C03C 3/06 (2006.01)
Patent
CA 2600667
Process for the production of monoliths of glass by means of the sol-gel process, comprising the following steps: a) dispersion in water of an oxide prepared by the pyrogenic route, b) hydrolysis of an alkoxide in aqueous solution to form a hydrolysate, c) mixing of the hydrolysate of the alkoxide with the oxide prepared by the pyrogenic route to form a colloidal sol, d) optional removal of coarse contents from the colloidal sol, e) gelling of the colloidal sol in a mould, f) replacement of the water contained in the resulting aerogel by an organic solvent, g) drying of the aerogel, h) heat treatment of the dried aerogel.
Procédé de production de verre par le procédé sol-gel enchaînant les opérations suivantes: a) dispersion dans l'eau d'un oxyde obtenu par le voie pyrogène, b) hydrolyse d'un alcoxyde en solution aqueuse donnant un hydrolysat, c) mélange de l'hydrolysat avec l'oxyde donnant un sol colloïdal, d) suppression éventuelle de contenus grossier du sol colloïdal, e) gélification du sol colloïdal dans un moule, f) remplacement de l'eau de l'aérogel par un solvant organique, g) séchage de l'aérogel, et h) traitement thermique de l'aérogel séché.
Boara Giulio
Costa Fulvio
Rueckemann Andreas
Degussa Novara Technology S.p.a.
Marks & Clerk
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