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    • 3. 发明申请
    • PROCESS FOR THE PRODUCTION OF METAL OXIDE AND METALLOID OXIDE DISPERSIONS
    • 生产金属氧化物和金属氧化物分散体的方法
    • WO2004089816A1
    • 2004-10-21
    • PCT/EP2004/003445
    • 2004-04-01
    • DEGUSSA AGLORTZ, WolfgangBATZ-SOHN, ChristophPERLET, GabrieleWILL, WernerSCHNEIDER, Gerrit
    • LORTZ, WolfgangBATZ-SOHN, ChristophPERLET, GabrieleWILL, WernerSCHNEIDER, Gerrit
    • C01B13/14
    • C09G1/02C01B13/145C01B33/1417C01F7/026C01P2002/50C01P2006/12C01P2006/22C03C1/006C09K3/1463
    • Process for the production of an aqueous dispersion of pyrogenically produced metal oxide and metalloid oxide powders with a BET surface area of between 5 and 600 m²/g, with a metal oxide or metalloid oxide content in the dispersion of between 5 and 25 wt.%, comprising the following steps: - water, which is optionally adjusted to pH values of between 2 and 4 by adding acids, is circulated from a receiving vessel via a rotor/stator machine, and - metal oxide or metalloid oxide powder is introduced, using a feed device, into the shear zone between the slots in the rotor teeth and the stator slots, continuously or discontinuously and with the rotor/stator machine running, in a quantity such that a predispersion with a solids content of between 20 and 40 wt.% results, and, after all the metal oxide powder or metalloid oxide powder has been added, - the feed device closes and shearing continues in such a way that the shear rate is in the range of between 10000 and 40000 s -1 , and - then, by dilution, the predispersion is adjusted to the desired solids content of the dispersion while maintaining the dispersing conditions.
    • 制备热塑性金属氧化物和类金属氧化物粉末的水分散体的方法,其BET表面积为5至600m 2 / g,分散体中的金属氧化物或准金属氧化物含量为5至25重量% 包括以下步骤: - 通过添加酸任选地将pH值调节至2至4的水通过转子/定子机从接收容器循环,并引入金属氧化物或准金属氧化物粉末,使用 进料装置,连续地或不连续地进入转子齿中的狭槽和定子槽之间的剪切区域,转子/定子机器运行的量使得固体含量在20和40重量%之间的预分散体。 %的结果,并且在添加了所有金属氧化物粉末或准金属氧化物粉末之后,进料装置关闭并且剪切继续进行,使得剪切速率在10000和40000s -1之间, 接着, 通过稀释,将预分散体调节至分散体的所需固体含量,同时保持分散条件。