PROCESS FOR PREPARING HIGH-PURITY SILICON DIOXIDE GRANULE
    12.
    发明申请
    PROCESS FOR PREPARING HIGH-PURITY SILICON DIOXIDE GRANULE 审中-公开
    制备高纯硅二氧化锗颗粒的方法

    公开(公告)号:US20100183495A1

    公开(公告)日:2010-07-22

    申请号:US12667796

    申请日:2008-06-16

    Abstract: Process for preparing a silicon dioxide granule having a specific surface area of less than 1 m2/g and a proportion of impurities of less than 50 ppm, in which a) a silicon dioxide powder with a tamped density of 15 to 190 g/l, b) is compacted to slugs which are subsequently crushed, the slug fragments having a tamped density of 210 to 800 g/l, and c) the slug fragments are treated with one or more reactive compounds at 400 to 1100° C.

    Abstract translation: 制备比表面积小于1m 2 / g的二氧化硅颗粒和小于50ppm的杂质比例的二氧化硅颗粒的方法,其中a)捣实密度为15至190g / l的二氧化硅粉末, b)被压实成随后被粉碎的块塞,碎块碎片具有210至800g / l的夯实密度,和c)在140至1100℃下用一种或多种反应性化合物处理段状碎片。

    Sol-gel process using porous mold
    17.
    发明授权
    Sol-gel process using porous mold 失效
    溶胶 - 凝胶法使用多孔模具

    公开(公告)号:US06514454B1

    公开(公告)日:2003-02-04

    申请号:US09807109

    申请日:2001-04-05

    Abstract: A sol-gel process for producing dry porous gel monoliths, e.g., silica glass monoliths, in which the successive process steps of gelling, aging and drying all occur within a mold formed of a selected porous material, e.g., graphite. The mold is inert to the gel solution and it has sufficient strength to withstand the temperatures and pressures encountered during the process. The mold and gel thereby can remain within a sealed autoclave during these process steps, and mechanical handling of the mold and the gel are minimized. This substantially enhances the process' efficiency. Alternatively, the mold can have a non-porous inner skin to enhance ease of cleaning of the mold, and of removal of the gel.

    Abstract translation: 用于生产干多孔凝胶整料(例如石英玻璃整料)的溶胶 - 凝胶方法,其中连续的胶凝,老化和干燥的工艺步骤全部发生在由选定的多孔材料例如石墨形成的模具内。 模具对凝胶溶液是惰性的,并且其具有足够的强度以承受在该过程中遇到的温度和压力。 因此,在这些工艺步骤期间,模具和凝胶可以保持在密封的高压釜内,并且模具和凝胶的机械处理最小化。 这大大提高了工艺的效率。 或者,模具可以具有无孔内皮,以增强模具的清洁容易性和去除凝胶。

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