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    Titanium dioxide coated with silicon dioxide
    8.
    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。 ％。

    Process for the production of doped metal oxide particles
    9.
    发明授权
    Process for the production of doped metal oxide particles 失效
    用于生产掺杂金属氧化物颗粒的方法

    公开(公告)号：US08535633B2

    公开(公告)日：2013-09-17

    申请号：US12091767

    申请日：2006-10-10

    申请人： Kai Schumacher ,  Rainer Golchert ,  Helmut Roth ,  Harald Alff ,  Matthias Rochnia

    发明人： Kai Schumacher ,  Rainer Golchert ,  Helmut Roth ,  Harald Alff ,  Matthias Rochnia

    IPC分类号： C01B13/00

    CPC分类号： C01B13/145 ,  C01G23/04 ,  C01P2002/52 ,  C01P2006/12 ,  C09C1/0081 ,  C09C1/3045 ,  C09C3/06 ,  C23C8/10

    摘要： Process for the production of doped metal oxide particles, wherein the doping component is present on the surface in the form of domains, wherein in a first reaction zone, an oxidizable and/or —hydrolysable metal compound as dopant together with an atomization gas is atomized into a flow of metal oxide particles in a carrier gas, wherein the mass flow of the metal oxide particles und —the mass flow of the dopant are selected such that the doped metal oxide particles contain 10 ppm to 10 wt. % of the doping component, where the quantity of dopant to be introduced is calculated as the corresponding oxide, and wherein the temperature in the first reaction zone is —selected such that it is below the boiling temperature of the dopant under the prevailing reaction conditions, and then, in a second reaction zone, the flow from the first —reaction zone and optionally at least as much oxygen and/or steam are —introduced that the quantity of oxygen and/or steam at least suffices completely to convert the dopant, wherein the temperature is from 300 to 2000° C., —preferably 500 to 1000° C., and the reaction mixture is then cooled or allowed to cool and the doped metal oxide particles are separated from the gaseous substances.

    摘要翻译： 用于生产掺杂金属氧化物颗粒的方法，其中掺杂组分以畴的形式存在于表面上，其中在第一反应区中，作为掺杂剂的可氧化和/或可水解的金属化合物与雾化气体一起雾化 进入载气中的金属氧化物颗粒的流动，其中选择金属氧化物颗粒的质量流与掺杂剂的质量流量，使得掺杂的金属氧化物颗粒含有10ppm至10wt。 掺杂成分的％，其中待引入的掺杂剂的量被计算为相应的氧化物，并且其中选择第一反应区中的温度使得其在主要反应条件下低于掺杂剂的沸点温度， 然后，在第二反应区中，引入来自第一反应区和任选地至少相同氧和/或蒸汽的流动，使得氧和/或蒸汽的量至少足以完全转化掺杂剂，其中 温度为300〜2000℃，优选为500〜1000℃，然后将反应混合物冷却或冷却，并将掺杂的金属氧化物颗粒与气态物质分离。