公开(公告)号：DE602007011040D1

公开(公告)日：2011-01-20

申请号：DE602007011040

申请日：2007-01-26

Applicant: EVONIK DEGUSSA GMBH

Inventor： LORTZ WOLFGANG ,  PERLET GABRIELE ,  WILL WERNER ,  REITZ SASCHA

IPC: C09K23/20 ,  C08K9/00

公开(公告)号：DE102007059861A1

公开(公告)日：2009-06-18

申请号：DE102007059861

申请日：2007-12-12

Applicant: EVONIK DEGUSSA GMBH

Inventor： LORTZ WOLFGANG ,  WILL WERNER ,  REITZ SASCHA ,  PERLET GABRIELE

IPC: C01B33/14 ,  C01B33/12

Abstract: Process for preparing an alkaline dispersion of aggregated silicon dioxide particles by dividing a preliminary dispersion within a pH of 3 to 5 into at least two streams, placing these streams under a pressure of at least 50 bar and depressurizing them to a collision point, each via one nozzle, in a grinding chamber, and admixing the dispersion that runs off at the bottom, while still in the grinding chamber, with an alkaline substance in an amount such that the dispersion overall has a pH of more than 7.

公开(公告)号：CA2496467C

公开(公告)日：2008-12-09

申请号：CA2496467

申请日：2003-07-29

Applicant: DEGUSSA

Inventor： SCHNEIDER GERRIT ,  NEUGEBAUER PETER ,  WILL WERNER ,  BATZ-SOHN CHRISTOPH ,  LORTZ WOLFGANG ,  PERLET GABRIELE

IPC: C01B33/148 ,  C01B33/149 ,  C01B33/141 ,  C09C1/30 ,  C09C3/06

Abstract: Aqueous dispersion containing silicon dioxide powder, which is stable in a p H range of 2 to 6, which contains a cation-providing compound that is at least partially soluble in this pH range and the zeta potential of which is less than or equal to zero. It is produced by bringing silicon dioxide powder and at least one cation-providing compound into contact whilst moving in an aqueous medium. The dispersion can be used for chemical-mechanical polishing of metal surfaces.

公开(公告)号：DE102004037118A1

公开(公告)日：2006-03-23

申请号：DE102004037118

申请日：2004-07-30

Applicant: DEGUSSA

Inventor： PERLET GABRIELE ,  LORTZ WOLFGANG ,  BATZ-SOHN CHRISTOPH ,  WILL WERNER ,  REITZ SASCHA

IPC: B01J13/00 ,  B01F3/12 ,  C09D5/02 ,  C09D5/32

Abstract: An aqueous dispersion that can be used in the coating of glass, ceramics and metal surfaces is prepared by placing, in water, an aggregated titanium dioxide powder having a specific surface area of from 20 to 150 m2/g in such an amount that the desired dispersion contains at least 20 wt. % titanium dioxide, and at least one amino alcohol having from 1 to 6 carbon atoms, and at least one carboxylic acid selected from dibasic carboxylic acids and/or hydroxycarboxylic acids having from 2 to 6 carbon atoms. A pre-dispersion is produced by introducing energy in an amount of less than 200 kJ/m3. Then a dispersion is produced in which the aggregated titanium dioxide powder has a mean, volume-related aggregate diameter of less than 150 nm by grinding the pre-dispersion with a high-energy mill at a pressure of at least 500 bar.

公开(公告)号：DE50106775D1

公开(公告)日：2005-08-25

申请号：DE50106775

申请日：2001-12-21

Applicant: DEGUSSA

Inventor： MANGOLD DR ,  LORTZ DR ,  BATZ-SOHN DR ,  PERLET GABRIELE ,  WILL WERNER

IPC: A61K8/18 ,  A61K8/25 ,  A61Q1/02 ,  C01B33/141 ,  C01B33/18 ,  C03C17/25 ,  C09C1/68 ,  C09G1/02 ,  C09K3/14 ,  D21H19/40 ,  H01L21/304 ,  H01L21/306

Abstract: A pyrogenic process is used to prepare alkali-doped silica particles. Particles produced by this process exhibit homogeneous doping, reduced agglomeration, greater stability and higher removal rates. Aqueous dispersions containing alkali-doped pyrogenic silica with average particle size less than 100 nm are used for polishing surfaces (CMP).

公开(公告)号：DE10317066A1

公开(公告)日：2004-11-11

申请号：DE10317066

申请日：2003-04-14

Applicant: DEGUSSA

Inventor： LORTZ WOLFGANG ,  BATZ-SOHN CHRISTOPH ,  PERLET GABRIELE ,  WILL WERNER ,  SCHNEIDER GERRIT

IPC: C01B13/14 ,  C01B33/141 ,  C01F7/02 ,  C03C1/00 ,  C09G1/02 ,  C09K3/14 ,  C01G1/02 ,  C01B33/14

Abstract: Process for the production of an aqueous dispersion of pyrogenically produced metal oxide and metalloid oxide powders with a BET surface area of between 5 and 600 m2/g, with a metal oxide or metalloid oxide content in the dispersion of between 5 and 25 wt. %, comprising the following steps: water, which is optionally adjusted to pH values of between 2 and 4 by adding acids, is circulated from a receiving vessel via a rotor/stator machine, and metal oxide or metalloid oxide powder is introduced, using a feed device, into the shear zone between the slots in the rotor teeth and the stator slots, continuously or discontinuously and with the rotor/stator machine running, in a quantity such that a predispersion with a solids content of between 20 and 40 wt. % results, and, after all the metal oxide powder or metalloid oxide powder has been added, the feed device closes and shearing continues in such a way that the shear rate is in the range of between 10000 and 40000 s-1, and then, by dilution, the predispersion is adjusted to the desired solids content of the dispersion while maintaining the dispersing conditions.

公开(公告)号：DE10229761B4

公开(公告)日：2004-08-05

申请号：DE10229761

申请日：2002-07-03

Applicant: DEGUSSA

Inventor： LORTZ WOLFGANG ,  BATZ-SOHN CHRISTOPH ,  HASENZAHL STEFAN ,  PERLET GABRIELE ,  WILL WERNER

IPC: A61K8/19 ,  A61K8/00 ,  A61K8/04 ,  A61K8/24 ,  A61K8/25 ,  A61K8/26 ,  A61K8/29 ,  A61Q17/04 ,  A61Q19/00 ,  C01G1/02 ,  C01G9/02 ,  C01G23/04 ,  C01G23/047 ,  C01G49/02 ,  C09C1/00 ,  C09C1/36 ,  C09D17/00 ,  A61K7/00

Abstract: Aqueous dispersion containing pyrogenically produced oxide particles of titanium, zinc, iron or cerium having an average particle size, expressed as a median value, in the dispersion of less than 200 nm, the particle sizes of the oxide particles are not distributed symmetrically in the dispersion, the dispersion contains as dispersing agent at least one (poly)phosphate corresponding to the general formula I and has a pH of 4.5 to 7.5. It is prepared by dispersing a stream of a preliminary dispersion by means of a high-energy mill. It can be used in sunscreen formulations.

公开(公告)号：DE59806324D1

公开(公告)日：2003-01-02

申请号：DE59806324

申请日：1998-06-30

Applicant: DEGUSSA

Inventor： MUENZENBERG DR ,  WILL WERNER ,  ZEZULKA GERD

IPC: C07F7/08 ,  C07F7/18

Abstract: Two-stage preparation of highly pure organosilicon disulfans of formula Z-Alk-S2-Alk-Z (I) comprises (1) dissolving or suspending sulfur (S) and an anhydrous sulfide of formula Me2S (II) in 1:(0.2-0.9) molar ratio and treating the solution or suspension with an organosilicon compound of formula Z-Alk-Hal (III), with a molar ratio of (III) to sulfur of (1.2-2):1; and (2) adding more (II) after reaction, in an amount approximately equimolar to the total amounts of (II) and S used for reaction, and isolating (I); in which Z = -Si(R )2R , -Si(R )(R )2 or -Si(R )3; R = 1-5C alkyl, 5-8C cycloalkyl, benzyl or a phenyl group optionally substituted by methyl (Me), ethyl (Et) or chlorine (Cl); R = 1-5C alkoxy, 5-8C cycloalkoxy, phenoxy or benzyloxy; Alk = a 1-10C divalent, saturated linear or branched hydrocarbon group or -CH2-Phe-CH2-; Phe = phenylene; Me = ammonium, an alkali metal or one equivalent of an alkaline earth metal or zinc; Hal = Cl or bromine (Br).

公开(公告)号：HU0100921D0

公开(公告)日：2001-05-28

申请号：HU0100921

申请日：2001-02-28

Applicant: DEGUSSA

Inventor： MICHEL RUDOLF ,  MUENZENBERG JOERG DR ,  WILL WERNER

IPC: C07F7/18

Abstract: Production of organosilylalkyl polysufides (I) by reacting an organosilylalkyl halide (II) with an anhydrous ionic sulfide (III) and elemental sulfur comprises adding (III) to a suspension of elemental sulfur and (II) in a polar organic solvent. Production of organosilylalkyl polysufides of formula (I) by reacting an organosilylalkyl halide of formula (II) with an anhydrous ionic sulfide of formula (III) and elemental sulfur comprises adding (III) to a suspension of elemental sulfur and (II) in a polar organic solvent: (R 1>R 2>R 3>SiR 4>)S x (I) , R 1>R 2>R 3>SiR 4>X (II) and M 2S (III) R 1>-R 3>1-8C alkyl, 1-8C alkoxy or aryl, at least one being alkoxy; R 4>1-8C alkylene or (CH 2) n-C 6H 4-(CH 2) n; n : 1-4; x : more than 1; X : Cl, Br or I; M : an alkali metal or ammonium cation or half an alkaline earth metal or zinc cation.

公开(公告)号：DE4130643A1

公开(公告)日：1993-03-18

申请号：DE4130643

申请日：1991-09-14

Applicant: DEGUSSA

Inventor： GOEBEL THOMAS DR ,  PANSTER PETER DR ,  WILL WERNER ,  KLEINSCHMIT PETER DR

IPC: C07F7/18 ,  C07F7/20

Abstract: A process for the purification of alkoxysilanes contaminated by organosilicon compounds having hydrolysable chlorine atoms, which is characterised in that the alkoxysilanes are reacted in a pressure reactor with an alcohol, preferably in the presence of an HCl acceptor, at a temperature from 5 DEG C to 160 DEG C above the boiling point of the alcohol used and at the autogenous pressure.