中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

40 records (took 0.019 seconds)

    Preparing zinc oxide powder, useful in e.g. dyes, comprises producing a flow containing zinc steam in vaporization zone, oxidizing the zinc steam in oxidation zone, cooling the reaction mixture and separating the powder in isolation zone
    31.
    发明专利
    Preparing zinc oxide powder, useful in e.g. dyes, comprises producing a flow containing zinc steam in vaporization zone, oxidizing the zinc steam in oxidation zone, cooling the reaction mixture and separating the powder in isolation zone 未知

    公开(公告)号：DE102005060121A1

    公开(公告)日：2007-06-21

    申请号：DE102005060121

    申请日：2005-12-16

    Applicant: DEGUSSA

    Inventor： ZIMMERMANN GUIDO ,  KATUSIC STIPAN ,  KRAEMER MICHAEL ,  MIESS HORST ,  YILMAZ NUH ,  MICHAEL GUENTHER

    IPC: C01G9/02

    Abstract: Preparation of zinc oxide powder comprises producing a flow containing zinc steam in a vaporization zone; oxidizing the zinc steam by reacting with an oxygen-containing gas under the formation of zinc oxide powder in an oxidation zone; cooling the reaction mixture by means of water or an inert gas; and separating the zinc oxide powder in a cooling/isolation zone. Preparation of zinc oxide powder comprises producing a flow containing zinc steam in a vaporization zone; oxidizing the zinc steam by reacting with an oxygen-containing gas under the formation of zinc oxide powder in an oxidation zone; cooling the reaction mixture by means of water or an inert gas; and separating the zinc oxide powder in a cooling/isolation zone, where in the vaporization zone, a gas flow from an inert gas and a gaseous fuel is introduced through a zinc melt exhibiting 750-850[deg]C, under the formation of zinc steam, where the portion of gaseous fuel is 1-50 vol.%, based on the sum of the inert gas and the gaseous fuel and the molar quotient of zinc steam to gaseous fuel is 0.01-50; and in the oxidation zone, a second gas flow comprising an oxygen-containing gas and water vapor is added in such a quantity to the gas flow from zinc steam, gaseous fuel and inert gas such that the temperature in the oxidation zone is 500-1100[deg]C, where the concentration of oxygen is at least sufficient to convert the whole of the gaseous fuel from the vaporization zone and zinc steam, and the water vapor is produced by the reaction of a gaseous fuel with the oxygen containing gas, which is introduced into the oxidation zone.

    34.
    发明专利
    未知

    公开(公告)号：DE102004039139A1

    公开(公告)日：2006-02-23

    申请号：DE102004039139

    申请日：2004-08-12

    Applicant: DEGUSSA

    Inventor： KATUSIC STIPAN ,  KRAEMER MICHAEL ,  MIESS HORST ,  HENNIG THOMAS ,  KRES PETER

    IPC: C01F17/00 ,  C01G25/02

    Abstract: Nano-scale yttrium-zirconium mixed oxide powder in the form of aggregated primary particles having the following physico-chemical parameters:-BET surface area: from 40 to 100 m2/g,-da=from 3 to 30 nm, d,=mean, number-related primary particle diameter,-yttrium content, calculated as yttrium oxide Y2O3, determined by chemical analysis, from 5 to 15 wt. %, based on the mixed oxide powder,-yttrium contents of individual primary particles, calculated as yttrium oxide Y2O3 determined by TEM EDX, corresponding to the content in the powder+-10%,-content at room temperature, determined by X-ray diffraction and based on the mixed oxide powder-monoclinic zirconium oxide from

    36.
    发明专利
    未知

    公开(公告)号：DE102008008184A1

    公开(公告)日：2009-08-13

    申请号：DE102008008184

    申请日：2008-02-08

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： KROELL MICHAEL ,  KRAEMER MICHAEL ,  ZWICKER GERFRIED ,  TORKLER MICHAEL

    IPC: C09G1/02 ,  C01F17/00 ,  C09G1/04 ,  H01L21/3105 ,  H01L21/461

    Abstract: Process for polishing silicon surfaces, in which a dispersion which comprises cerium oxide particles, at least one polymeric, anionic dispersing additive and at least one oxidizing agent and which has a pH of 7 to 10.5 is used, said cerium oxide particles having a positive charge and polymeric, anionic dispersing additive and oxidizing agent being soluble in the liquid phase of the dispersion.

    39.
    发明专利
    未知

    公开(公告)号：DE10317067A1

    公开(公告)日：2004-11-11

    申请号：DE10317067

    申请日：2003-04-14

    Applicant: DEGUSSA

    Inventor： GOTTFRIED HEIKO ,  KATUSIC STIPAN ,  KRAEMER MICHAEL ,  PRIDOEHL MARKUS ,  WOMBACHER WILLIBALD ,  ZIMMERMANN GUIDO

    IPC: C01B13/24 ,  C01B13/34 ,  C01B33/18 ,  C01F7/30 ,  C01G1/02 ,  C01G19/00 ,  C01G23/07 ,  C01G25/02

    Abstract: Composite powder with a matrix-domain structure comprises a matrix of a single metal oxide in the form 3-dimensional aggregates with a diameter of no more than 250 nm in at least one dimension, and domains comprising at least two metal oxides, at least two noble metals or a metal oxide/noble metal mixture within the matrix. The powder has a surface area of 60-1200 m2>/cm3>. An independent claim is also included for producing the composite powder by mixing precursors of the matrix and domain oxides with a fuel gas and oxygen, reacting the precursors in a reactor comprising a combustion zone and a reaction zone, cooling the hot gases and solid products and separating the products from the gases.

Patent Agency Ranking