Method for the manufacture of SiO.sub.2 granular material

Details Method for the manufacture of SiO.sub.2 granular material Method for the manufacture of SiO.sub.2 granular material

1998-07-09

1999-11-09

Silverman, Stanley S.

Glass manufacturing

Processes

Self-supporting particle making

264 5, 264 8, 501 54, 65 172, 65 173, C03B 900, C03B 800, C03B 1901, C03B 1909

Patent

active

059791861

ABSTRACT:
A method is provided for the manufacture of SiO.sub.2 granular material. Silicic acid is dispersed in a liquid to form a dispersion. The dispersion is stirred in a stirring tank with formation of a homogeneous liquid phase. The homogeneous liquid phase is maintained by stirring at a substantially constant rate until the granular mass develops, when the solids content of the dispersion is within the range of 65 to 80 weight percent. Moisture is gradually extracted to form a granular mass which is dried and sintered.

REFERENCES:
patent: 3383172 (1968-05-01), Biegler
patent: 4042361 (1977-08-01), Bihuniak et al.
patent: 4126422 (1978-11-01), Brandes
patent: 4528163 (1985-07-01), Albrecht
patent: 5643347 (1997-07-01), Werdecker et al.
Derwent for DD 297 801, Jan. 23, 1992.

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