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    • 3. 发明申请
    • ALUMINIUM OXIDE POWDER PRODUCED BY FLAME HYDROLYSIS AND HAVING A LARGE SURFACE AREA
    • 火焰水解法制备的氧化铝粉末及其大面积表面
    • WO2005061385A2
    • 2005-07-07
    • PCT/EP2004013564
    • 2004-11-30
    • DEGUSSASCHUMACHER KAIGOLCHERT RAINERSCHILLING ROLANDBATZ-SOHN CHRISTOPHMOERTERS MARTIN
    • SCHUMACHER KAIGOLCHERT RAINERSCHILLING ROLANDBATZ-SOHN CHRISTOPHMOERTERS MARTIN
    • C01F7/02C01F7/30
    • C01F7/302C01P2002/01C01P2002/02C01P2002/72C01P2004/50C01P2006/10C01P2006/12C01P2006/19
    • Aluminium oxide powder produced by flame hydrolysis and consisting of aggregates of primary particles, having a BET surface area of from 100 to 250 m /g, a dibutyl phthalate absorption of from 50 to 450 g/100 g of aluminium oxide powder, which powder shows only crystalline primary particles in high-resolution TEM pictures. It is prepared by vaporising aluminium chloride, transferring the vapour by means of a carrier gas to a mixing chamber and, separately therefrom, supplying hydrogen, air (primary air), which may optionally be enriched with oxygen and/or may optionally be pre-heated, to the mixing chamber, then igniting the mixture of aluminium chloride vapour, hydrogen, air in a burner and burning the flame into a reaction chamber that is separated from the surrounding air, subsequently separating the solid material from the gaseous substances and then treating the solid material with steam and optionally with air, the discharge rate of the reaction mixture from the mixing chamber into the reaction chamber being at least 10 m/s, and the lambda value being from 1 to 10 and the gamma value being from 1 to 15. It can be used as an ink-absorbing substance in ink-jet media.
    • 通过火焰水解制备并由初级颗粒聚集体组成的氧化铝粉末,其BET表面积为100-250平方米/克,邻苯二甲酸二丁酯吸收量为50-450克/ 100克氧化铝粉末, 该粉末在高分辨率TEM照片中仅显示结晶初级粒子。 它通过蒸发氯化铝,通过载气将蒸汽转移到混合室并与此分开地供应氢气,空气(一次空气),其可以任选地富含氧气和/或可以任选地被预处理, 加热到混合室,然后在燃烧器中点燃氯化铝蒸汽,氢气和空气的混合物,并将火焰燃烧到与周围空气分离的反应室中,随后将固体物质与气态物质分离,然后处理 具有蒸汽和任选的空气的固体材料,反应混合物从混合室进入反应室的排出速率至少为10m / s,λ值为1至10,γ值为1至10 15.它可以用作喷墨介质中的吸墨物质。