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    PROCESS FOR PRODUCING CERAMIC POWDERS, ESPECIALLY TITANIUM DIOXIDE USEFUL AS A PHOTOCATALYST
    2.
    发明公开
    PROCESS FOR PRODUCING CERAMIC POWDERS, ESPECIALLY TITANIUM DIOXIDE USEFUL AS A PHOTOCATALYST 失效
    用于生产陶瓷粉体，特别是二氧化钛用作催化剂PHOTO

    公开(公告)号：EP0778812A1

    公开(公告)日：1997-06-18

    申请号：EP95930964.0

    申请日：1995-08-25

    申请人： UNIVERSITY OF CINCINNATI

    发明人： PRATSINIS, Sotiris, Emmanuel ,  VEMURY, Srinivas ,  FOTOU, George, P. ,  GUTSCH, Andreas

    IPC分类号： B01J21 ,  B01J35 ,  C01B13 ,  C01B21 ,  C01B33 ,  C01G19 ,  C01G23

    CPC分类号： C01B21/06 ,  C01B13/28 ,  C01B33/183 ,  C01G19/02 ,  C01G23/07 ,  C01P2002/54 ,  C01P2004/82 ,  C01P2006/12

    摘要： A gas phase process for the production of titanium dioxide powders having well-controlled crystalline and surface area characteristics is disclosed. In this process, which is preferably carried out in a laminar diffusion flame reactor, vapor phase TiCl4 and oxygen are mixed in a reaction area which is heated externally. The titanium dioxide powder formed is then collected. It is preferred that the heat source used be a hydrocarbon fueled (e.g., methane) flame. Optionally, a vapor phase dopant (such as SiCl4) may be added to the reaction mixture to desirably affect the physical properties of the titanium dioxide produced. In a particularly preferred embodiment, a corona electric field is positioned across the area where the combustion reaction takes place (i.e., the reaction area). High anatase, high surface area titanium dioxide powders made by this process are excellent photocatalysts. The products of this process and the use of those products as photocatalysts are also disclosed. This process is also useful for producing other ceramic powders (such as silicon dioxide and tin oxide), as well as pure metallic or alloy powders.

    摘要翻译： 对于具有良好控制的晶体线和表面积特性生产的二氧化钛粉末的气相方法是游离缺失盘。 在这个过程中，所有这些优选在层流扩散火焰反应器中进行，汽相TiCl 4和氧气在反应areaswhich混合时外部加热。 然后将形成的二氧化钛粉末被收集。 它是优选的，管芯DASS是烃使用热源燃料（例如，甲烷）的火焰。 任选地，汽相掺杂剂（：如四氯化硅）可加入到反应混合物中以理想地影响所产生的二氧化钛的物理性质。 在特别优选的实施方案中，电晕电场横跨在燃烧反应发生的区域（即反应区），其定位。 高锐钛矿，由该方法制备的高表面积的二氧化钛粉末是优异的照片的催化剂。 因此，这个过程和使用这些产品作为光催化剂的产品是游离缺失盘。 这个过程因此对于生产其他陶瓷粉末（色：如二氧化硅和氧化锡）是有用的，以及纯金属或合金粉末。