Production of high pore volume alumina spheres
    1.
    发明授权
    Production of high pore volume alumina spheres 失效
    生产高孔体积的氧化铝球体

    公开(公告)号:US4140773A

    公开(公告)日:1979-02-20

    申请号:US880830

    申请日:1978-02-24

    IPC分类号: C01F7/36 C01F7/02

    摘要: High macro-pore content spheres (>1000A) are produced by use of a rotating wheel, wherein dry alumina is dropped onto the wheel under a peptizing spray misted onto the wheel through an atomizing device. Compressive stresses normally encountered in procedures such as pelletizing are avoided, thereby preserving macro-pores. Size of spheres can be adjusted by altering, for example, the angle at which the wheel rotates.

    摘要翻译: 通过使用旋转轮产生高的大孔含量球体(> 1000A),其中干燥氧化铝通过雾化装置在雾化喷雾下方落在轮上。 避免在诸如造粒的过程中通常遇到的压缩应力,从而保留大孔。 可以通过改变例如车轮旋转的角度来调节球体的尺寸。

    High pore volume alumina powders
    2.
    发明授权
    High pore volume alumina powders 失效
    高孔体积氧化铝粉末

    公开(公告)号:US4218413A

    公开(公告)日:1980-08-19

    申请号:US970282

    申请日:1978-12-18

    摘要: A method for increasing the pore volume of alumina powder produced by spray drying alumina slurries by heating the slurry to a temperature near the boiling point of water and a pressure up to the critical point of water then introducing the slurry to a spray drying chamber through a small orifice, thereby creating a backpressure in excess of slurry vapor pressure and up to the critical point of water.

    摘要翻译: 通过将浆料加热到接近水沸点的温度并将压力升至水的临界点,从而通过喷雾干燥氧化铝浆料产生的氧化铝粉末的孔体积增加的方法,然后将浆料通过 从而产生超过浆料蒸汽压力并高达临界点的背压。