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公开(公告)号：DE102004022064A1
公开(公告)日：2005-11-24
申请号：DE102004022064
申请日：2004-05-05
Applicant: DEGUSSA
Inventor： KATUSIC STIPAN , PETRAT FRANK MARTIN , KRAEMER MICHAEL , ZIMMERMANN GUIDO , WOMBACHER WILLIBALD , STAAB EDWIN
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公开(公告)号：DE10160817A1
公开(公告)日：2003-06-26
申请号：DE10160817
申请日：2001-12-11
Applicant: DEGUSSA
Inventor： GOTTFRIED HEIKO , KRAEMER MICHAEL , TRAGESER BERTHOLD , STAUPENDAHL GISBERT , KURLAND HEINZ-DIETER , GRABOW JANET
Abstract: Production of a nano-scale powder made from large grain starting material comprises: separating out the starting material particles; vaporizing the particles by laser irradiation; recondensing the particles to form the nano-scale particles; removing the nano-scale particles from the region of the interaction; and removing the nano-scale particles. An Independent claim is also included for a device for producing the nano-scale powder made from large grain starting material comprising: a reaction chamber (5); an operating gas supply (10) for producing a particle-gas eddy (7) made from the starting material (6) and the operating gas (9) in the chamber; a unit (14) for removing the nano-scale particles; and a laser arrangement (1, 2, 3, 4). Preferred Features: The starting material particles are separated using a flowing fluid, preferably a gas stream. The laser irradiation is produced using a high performance laser, preferably a carbon dioxide (CO2) laser.
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公开(公告)号：NO20011360L
公开(公告)日：2001-09-19
申请号：NO20011360
申请日：2001-03-16
Applicant: DEGUSSA
Inventor： MORITZ TASSILO , REETZ TEJA , DELLER KLAUS , GUTSCH ANDREAS , KRAEMER MICHAEL , MICHAEL GUENTHER
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公开(公告)号：DE602005023491D1
公开(公告)日：2010-10-21
申请号：DE602005023491
申请日：2005-07-19
Applicant: EVONIK DEGUSSA GMBH
Inventor： KATUSIC STIPAN , KRAEMER MICHAEL , MIESS HORST , HENNIG THOMAS , KRESS PETER
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公开(公告)号：AT377631T
公开(公告)日：2007-11-15
申请号：AT04764712
申请日：2004-09-02
Applicant: EVONIK DEGUSSA GMBH
Inventor： KATUSIC STIPAN , KRAEMER MICHAEL , KRESS PETER , MIESS HORST , ZIMMERMANN GUIDO , ALBERS PETER
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.
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Patent Agency Ranking
公开(公告)号：MY142439A
公开(公告)日：2010-11-30
申请号：MYPI20063879
申请日：2006-08-10
Applicant: EVONIK DEGUSSA GMBH
Inventor： KATUSIC STIPAN , HEBERER STEFAN , STAAB EDWIN , KROELL MICHAEL DR , KRAEMER MICHAEL , MICHAEL GUENTHER DR
Abstract: 2 0 CERIUM OXIDE POWDER AND CERIUM OXIDE DISPERSION ABSTRACT CERIUM OXIDE POWDER WHICH HAS CARBONATE GROUPS AND 5 COMPRISES CRYSTALLINE PRIMARY PARTICLES WHICH CONTAIN CERIUM OXIDE AND CARBONATE GROUPS ON THEIR SURFACE AND IN A LAYER CLOSE TO THE SURFACE, WHEREIN THE POWDER HAS A BET SURFACE AREA OF FROM 25 TO 150 M2 /G , 10 THE PRIMARY PARTICLES HAVE A MEAN DIAMETER OF FROM 5 TO 50 NM, THE LAYER CLOSE TO THE SURFACE OF THE PRIMARY PARTICLES HAS A DEPTH OF ABOUT 5 NM, THE CARBONATE CONCENTRATION IN THE LAYER CLOSE TO THE 15 SURFACE DECREASES INWARDS FROM THE SURFACE ON WHICH THE CARBONATE CONCENTRATION IS HIGHEST, - THE CARBON CONTENT DUE TO THE CARBONATE GROUPS ON THE SURFACE IS FROM 5 TO 50BY AREA AND THAT AT A DEPTH OF ABOUT 5 NM IN THE LAYER CLOSE TO THE SURFACE IS 20 FROM 0 TO 30BY AREA, - THE CONTENT OF CERIUM OXIDE, CALCULATED AS CEO2 AND BASED ON THE POWDER, IS AT LEAST 99.5BY WEIGHT AND THE CONTENT OF CARBON, ENCOMPASSING ORGANIC AND INORGANIC CARBON, IS FROM 0.01 TO 0.3BV WEIGHT, 25 BASED ON THE POWDER. DISPERSION CONTAINING THIS POWDER. I OO
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公开(公告)号：AT445573T
公开(公告)日：2009-10-15
申请号：AT01115294
申请日：2001-06-25
Applicant: EVONIK DEGUSSA GMBH
Inventor： GUTSCH ANDREAS , KATUSIC STIPAN , KRAEMER MICHAEL , KRESS PETER , VARGA GEOFFREY J , ZIMMERMANN GUIDO
IPC: C01G23/00
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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.
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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.
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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
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.
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