Process for the hydrophobization of pyrogenically produced silica
    2.
    发明授权
    Process for the hydrophobization of pyrogenically produced silica 失效
    热解产生的二氧化硅的疏水化方法

    公开(公告)号:US4503092A

    公开(公告)日:1985-03-05

    申请号:US477875

    申请日:1983-03-23

    IPC分类号: C01B33/16 C01B33/18 C09C1/30

    CPC分类号: C09C1/3081 C01P2004/84

    摘要: Pyrogenically produced silica after separation of the hydrogen halide is mixed with nitrogen and conveyed into a cyclone. After separation of the gases, which are returned into the cooling stretch of the production apparatus, the silica is first mixed with organohalosilane and nitrogen and subsequently with steam and nitrogen. Subsequently the hydrophobization reaction is carried out in known manner in a fluidized bed reactor. The reaction waste gases are returned into the cyclone.

    摘要翻译: 将卤化氢分离后的热解生成的二氧化硅与氮气混合并输送到旋风分离器中。 在分离返回到制备装置的冷却段中的气体之后,首先将二氧化硅与有机卤代硅烷和氮气混合,然后与蒸汽和氮气混合。 随后,在流化床反应器中以已知的方式进行疏水化反应。 反应废气返回旋风分离器。