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    84.
    发明专利
    未知

    公开(公告)号：DE102006027334A1

    公开(公告)日：2008-01-10

    申请号：DE102006027334

    申请日：2006-06-13

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： KATUSIC STIPAN ,  ZIMMERMANN GUIDO ,  KRAEMER MICHAEL ,  GOTTFRIED HEIKE ,  KRES PETER

    IPC: C01G1/02

    Abstract: Process for preparing a metal oxide powder, in which starting materials are evaporated and oxidized, wherein a metal melt in the form of droplets and one or more combustion gases are fed to the evaporation zone of a reactor, where the metal melt is evaporated completely under nonoxidizing conditions, subsequently, the mixture flowing out of the evaporation zone is reacted in the oxidation zone of this reactor with a stream of a supplied oxygen-containing gas whose oxygen content is at least sufficient to oxidize the metal and the combustion gases completely.

    85.
    发明专利
    未知

    公开(公告)号：DE102006027302A1

    公开(公告)日：2008-01-10

    申请号：DE102006027302

    申请日：2006-06-13

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： KATUSIC STIPAN ,  ZIMMERMANN GUIDO ,  KRAEMER MICHAEL ,  KRES PETER ,  MIESS HORST

    IPC: C01G1/02

    Abstract: Process for preparing a mixed metal oxide powder, in which oxidizable starting materials are evaporated and oxidized, the reaction mixture is cooled after the reaction and the pulverulent solids are removed from gaseous substances, wherein as starting materials, at least one pulverulent metal and at least one metal compound, the metal and the metal component of the metal compound being different and the proportion of metal being at least 80% by weight based on the sum of metal and metal component from metal compound, together with one or more combustion gases, are fed to an evaporation zone of a reactor, where metal and metal compound are evaporated completely under nonoxidizing conditions, subsequently, the mixture flowing out of the evaporation zone is reacted in the oxidation zone of this reactor with a stream of a supplied oxygen-containing gas whose oxygen content is at least sufficient to oxidize the starting materials and combustion gases completely.

    86.
    发明专利
    未知

    公开(公告)号：DE602004009944D1

    公开(公告)日：2007-12-20

    申请号：DE602004009944

    申请日：2004-09-02

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： KATUSIC STIPAN ,  KRAEMER MICHAEL ,  KRESS PETER ,  MIESS HORST ,  ZIMMERMANN GUIDO ,  ALBERS PETER

    IPC: C09C1/04 ,  C01G9/03

    Abstract: Pyrogenically prepared zinc oxide powder having a BET surface area of from 10 to 200 m 2 /g, which is in the form of aggregates, the aggregates being composed of particles having different morphologies, and 0-10% of the aggregates being in a circular form, 30-50% being in an ellipsoidal form, 30-50% being in a linear form and 20-30% being in a branched form. It is prepared by reacting a starting mixture containing zinc vapour, a combustible gas and steam or a mixture of steam and carbon dioxide in a flame with an oxygen-containing gas in an oxidation zone, cooling the hot reaction mixture in a quenching zone and separating the solid material from the gas stream, the amount of oxygen in the oxidation zone being greater than the amount necessary for the complete oxidation of the combustible gas and the zinc vapour. The zinc oxide powder can be used as a constituent of sun protection compositions for protection against UV radiation.

    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
    87.
    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.

    90.
    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

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