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    Silicon-titanium mixed oxide powder prepared by flame hydrolysis, which is surface-enriched with silicon dioxide, and the preparation and the use thereof
    19.
    发明授权
    Silicon-titanium mixed oxide powder prepared by flame hydrolysis, which is surface-enriched with silicon dioxide, and the preparation and the use thereof 有权
    通过火焰水解制备的硅 - 钛混合氧化物粉末，其表面富集二氧化硅，以及其制备及其用途

    公开(公告)号：US07083769B2

    公开(公告)日：2006-08-01

    申请号：US10326554

    申请日：2002-12-23

    申请人： Martin Moerters ,  Ina Hemme ,  Steffen Hasenzahl ,  Uwe Diener ,  Herbert Habermann

    发明人： Martin Moerters ,  Ina Hemme ,  Steffen Hasenzahl ,  Uwe Diener ,  Herbert Habermann

    IPC分类号： C01B33/20 ,  A61Q17/04

    CPC分类号： C09C1/3653 ,  A61K8/25 ,  A61K8/29 ,  A61K2800/59 ,  A61Q17/04 ,  C01G23/07 ,  C01P2006/12 ,  Y10T428/2993

    摘要： Silicon-titanium mixed oxide powder prepared by flame hydrolysis, having a ratio by weight of silicon dioxide/titanium dioxide, which is greater on the surface of the primary particles than that within the total primary particle. It is prepared by a flame hydrolysis process, in that a stream consisting of a vaporous titanium dioxide precursor and oxygen or an oxygen-containing gas and hydrogen, and a second stream consisting of a vaporous silicon dioxide precursor and a carrier gas consisting of oxygen, an oxygen-containing gas and/or an inert gas, are guided separately into the reaction chamber of a burner such as is known for the preparation of pyrogenic oxides, and are burnt here, the solid mixed oxide powder and hot gases are subsequently cooled, and the gases are separated from the solid. The powder may be used, for example, for the preparation of sunscreen preparations.

    摘要翻译： 通过火焰水解制备的硅 - 钛混合氧化物粉末，其具有二氧化硅/二氧化钛的重量比，其在一次颗粒的表面上大于总原始颗粒内的比例。 其通过火焰水解方法制备，其中由气态二氧化钛前体和氧气或含氧气体和氢气组成的物流和由气态二氧化硅前体和由氧气组成的载气组成的第二物流， 将含氧气体和/或惰性气体分别引导到诸如已知用于制备致热氧化物的燃烧器的反应室中，并且在此被燃烧，随后冷却固体混合氧化物粉末和热气体， 并且气体与固体分离。 该粉末可用于例如防晒制剂的制备。

    Titanium dioxide coated with silicon dioxide
    20.
    发明申请
    Titanium dioxide coated with silicon dioxide 有权
    二氧化钛涂覆二氧化硅

    公开(公告)号：US20060057385A1

    公开(公告)日：2006-03-16

    申请号：US10539061

    申请日：2003-12-02

    申请人： Kai Schumacher ,  Christoph Batz-Sohn ,  Steffen Hasenzahl

    发明人： Kai Schumacher ,  Christoph Batz-Sohn ,  Steffen Hasenzahl

    IPC分类号： C09C1/36 ,  B32B5/16

    CPC分类号： C09C1/3661 ,  C01G23/07 ,  C01P2004/03 ,  C01P2004/84 ,  C01P2006/12 ,  C01P2006/90 ,  Y10T428/2993

    摘要： Powder consisting of particles with a core of titanium dioxide and a coating of silicon dioxide, which powder has a content of silicon dioxide of between 0.5 and 40 wt. %, a BET surface of between 5 and 300 m2/g, and which consists of primary particles that have a coating of silicon dioxide and a core of titanium dioxide. The powder is produced according to a process in which a vaporisable silicon compound and a vaporisable titanium compound are mixed corresponding to the subsequently desired ratio of SiO2 and TiO2 in the product, are vaporised at temperatures of 200° C. or less, and conveyed by means of an inert gas stream together with hydrogen and air or with oxygen-enriched air to the central pipe (core) of a known burner, the reaction mixture is ignited at the mouth of the burner and introduced together with secondary air, is combusted in a cooled flame pipe, following which the titanium dioxide powder coated with silicon dioxide is separated from the gaseous reaction products and if necessary is freed in moist air from adhering hydrogen chloride, the ratio of primary air to secondary air being greater than 0.3, the ratio of core hydrogen to secondary air being greater than 1, and the ratio of titanium dioxide precursor to secondary air being greater than 0.5. Sunscreen agent containing the powder in an amount of between 0.01 and 25 wt. %.

    摘要翻译： 由具有二氧化钛核心和二氧化硅涂层的颗粒组成的粉末，该粉末的二氧化硅含量为0.5〜40重量％。 ％，BET表面积在5和300m 2 / g之间，并且其由具有二氧化硅涂层和二氧化钛核心的一次粒子组成。 该粉末根据其中可蒸发的硅化合物和可蒸发的钛化合物混合的方法制备，相应产物中随后所需的SiO 2和TiO 2的比例 ，在200℃或更低的温度下蒸发，并通过惰性气体流与氢气和空气或富氧空气一起输送到已知燃烧器的中心管（核心）上，将反应混合物点燃 在燃烧器的口处并与二次空气一起引入，在冷却的火焰管中燃烧，随后将二氧化硅涂覆的二氧化钛粉末与气态反应产物分离，如果需要，在潮湿的空气中从附着的氯化氢 ，一次空气与二次空气的比例大于0.3，核心氢气与二次空气的比例大于1，二氧化钛前体与二次空气的比例大于0.5。 含有粉末的防晒剂的量为0.01至25wt。 ％。