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    TITANDIOXID-PIGMENTPARTIKEL MIT DOTIERTER DICHTER SiO2-HÜLLE UND VERFAHREN ZUR HERSTELLUNG
    71.
    发明公开
    TITANDIOXID-PIGMENTPARTIKEL MIT DOTIERTER DICHTER SiO2-HÜLLE UND VERFAHREN ZUR HERSTELLUNG 审中-公开
    含掺杂致密的SiO2盖和方法二氧化钛颜料颗粒用于生产

    公开(公告)号：EP1979421A2

    公开(公告)日：2008-10-15

    申请号：EP07703117.7

    申请日：2007-01-30

    申请人： KRONOS INTERNATIONAL, INC.

    发明人： REWS-NICOLAI, Lydia ,  BLUEMEL, Siegfried

    IPC分类号： C09C1/36

    CPC分类号： C09C1/3661 ,  C01P2002/52 ,  C01P2002/54 ,  C01P2004/84 ,  Y10T428/24372 ,  Y10T428/2438 ,  Y10T428/24388 ,  Y10T428/2991

    摘要： The invention relates to titanium dioxide pigment particles which have improved photo stability, their surface being coated with a dense SiO2 skin that is doped with at least one doping element. The SiO2 skin is characterized in that the doping with the at least one doping element reduces the energy level densities in the valence band and/or in the conduction band in the vicinity of the band gap or that additional energy levels in the band gap are produced. The doped dense SiO2 skin is applied using known wet-chemical methods or is applied in the gas phase to the surface of the titanium dioxide particles. Particularly suitable doping elements are Sn, Sb, In, Ge, Y, Nb, F, Mn, Cu, Mo, Cd, Ce, W and Bi. The following known doping elements AI, B, Ge, Mg, Nb, P, Zr for the gas phase method and Ag, AI, B, Ba, Be, Ca, Cd, Co, Cr, Cu, Mg, Mn, Ni, Nb, Sn, Sr, Ti, Zn, Zr for the wet-chemical method are excluded from the invention.

    SPIRAL JET MILL WITH MULTIPLE PRODUCT INJECTOR NOZZLES AND METHOD OF MILLING A GRANULAR PRODUCT
    72.
    发明公开
    SPIRAL JET MILL WITH MULTIPLE PRODUCT INJECTOR NOZZLES AND METHOD OF MILLING A GRANULAR PRODUCT 审中-公开

    公开(公告)号：EP4442368A1

    公开(公告)日：2024-10-09

    申请号：EP23166851.8

    申请日：2023-04-05

    申请人： KRONOS INTERNATIONAL, Inc.

    发明人： The designation of the inventor has not yet been filed

    IPC分类号： B02C19/06

    CPC分类号： B02C19/061

    摘要： A spiral jet mill for grinding granular product, such as TiO2 particles, includes multiple, such as at least two product injector nozzles for mixing and injecting a corresponding number of streams of steam or other pressurized gas and the granular product into the grinding chamber. In use, the ratio of total pressurized gas, such as the sum of all input steam and grinding steam injected into the grinding chamber, to granular product, such as TiO2 pigment particles, is preferably less than the corresponding ratio used in conventional processes so as to realize energy savings relative to the amount of steam or other pressurized gas that is used per unit of granular product that is milled.

    METHOD FOR COATING THE SURFACE OF A SUBSTRATE
    77.
    发明公开
    METHOD FOR COATING THE SURFACE OF A SUBSTRATE 审中-公开

    公开(公告)号：EP3400263A2

    公开(公告)日：2018-11-14

    申请号：EP17708158.5

    申请日：2017-01-09

    申请人： KRONOS INTERNATIONAL, INC.

    发明人： BEYER, Norbert

    IPC分类号： C09C1/36 ,  C09C3/06

    摘要： A method for coating the surface of a substrate, such as inorganic particles, with a metal oxide. A suspension is formed containing the substrate, a polyvalent anion and a metal ion where the molar ratio of the polyvalent anion to the metal ion is greater than three and the metal ion is precipitated onto the substrate as a metal oxide. Preferably, the method is used to coat titanium dioxide pigment particles with aluminum oxide.