公开(公告)号：MY137950A

公开(公告)日：2009-04-30

申请号：MYPI20041781

申请日：2004-05-13

Applicant: EVONIK DEGUSSA GMBH

Inventor： CHRISTIAN HANS-DIETER ,  SCHUBERT JUERGEN DR ,  SCHMEIER UWE

IPC: C09C1/30 ,  C09D7/00

Abstract: THE INVENTION RELATES TO SURFACE-MODIFIED PRECIPITATED SILICAS WHOSE SURFACE HAS BEEN MODIFIED BY TREATMENT WITH A POLYMER SUCH THAT THEY ARE ESPECIALLY SUITABLE FOR USE AS MATTING AGENTS.

公开(公告)号：DE502004004410D1

公开(公告)日：2007-09-06

申请号：DE502004004410

申请日：2004-04-16

Applicant: DEGUSSA

Inventor： CHRISTIAN HANS-DIETER ,  SCHUBERT JUERGEN DR ,  SCHMEIER UWE

IPC: C01B33/149 ,  C01B33/193 ,  C09C1/30 ,  C09C3/10 ,  C09C3/12 ,  C09D7/00

Abstract: A precipitated silicic acid (I) has a surface that is modified by treatment with a polymer such that the transmission of a clear lacquer having a refractive index n D20 of 1.4492 and containing 5 wt.% of the modified silicic acid (I) is at least 20 % better than that of the same clear lacquer containing 5 wt.% of a reference precipitated silicic acid that has been treated with a polyethylene wax. An independent claim is included for a process for the production of the surface modified silicic acid (I) by: (a) precipitation of an alkali silicate solution with an acid under alkali to weakly acidic conditions; (b) further addition of an acid to adjust the pH to 7-2 to yield a silicic acid suspension; (c) filtering of the precipitated solid; and (d) drying of the solid by slow drying in a rotating tube dryer or plate drying or by means of rapid drying in a spray dryer or spinflash dryer to a residual moisture content of less than 10 % whereby the precipitated silicic acid is treated with a polymer to yield the silicic acid (I).

公开(公告)号：DE50308157D1

公开(公告)日：2007-10-25

申请号：DE50308157

申请日：2003-07-12

Applicant: DEGUSSA

Inventor： SCHUBERT JUERGEN DR ,  KUHLMANN ROBERT ,  CHRISTIAN HANS-DIETER

IPC: C01B33/143 ,  C01B33/193 ,  C01B33/12 ,  C09C1/30 ,  C09C3/08 ,  C09C3/10 ,  C09D5/00 ,  C09D7/00 ,  C09D7/12 ,  C09D201/00

Abstract: A precipitated silica has a Brunauer-Emmett-Teller (BET surface area) of 350-550 m2/g; DBP number of 320-400 g/100 g, where DBP number is a measure of porosity; d50 of 5-15 microns (i.e. 50% of the measured particles, based on volume, are smaller than this volume); and tamped density of 20-90 g/l.

公开(公告)号：DK0957065T3

公开(公告)日：2004-01-26

申请号：DK99109070

申请日：1999-05-07

Applicant: DEGUSSA

Inventor： SCHUBERT JUERGEN DR ,  GLAUM HOLGER DR

IPC: C01B33/26

Abstract: Aqueous aluminum silicate suspension contains water and at least 30 wt.% aluminum silicate, 0.1-30 wt.% aluminum sulfate and 0.1-5.0 wt.% surfactant. An Independent claim is also included for a process for the production of the aluminum silicate suspension comprising precipitating and filtering off an aluminum silicate prepared synthetically from aluminum sulfate and water glass, liquefying the aluminum silicate filter cake with an aqueous aluminum sulfate solution with stirring and/or shearing, adding at least one surfactant, adding a powdered aluminum silicate to the filter cake with stirring and/or shearing, and stirring and/or shearing the mixture at least a further time.

公开(公告)号：BR9902561A

公开(公告)日：2000-01-04

申请号：BR9902561

申请日：1999-06-25

Applicant: DEGUSSA

Inventor： SCHUBERT JUERGEN DR ,  LORTZ WOLFGANG DR

IPC: B01D19/04 ,  B01J8/00 ,  B05D7/00 ,  C01B33/18 ,  C09C1/30 ,  C09C3/12 ,  D21H17/68 ,  D21H19/40 ,  F26B3/12

Abstract: Hydrophobic precipitated silica (I) with a drying loss of 2.0-10% (DIN ISO 787/2), calcination loss of 2-25% (DIN ISO 3262/11), methanol wettability of 20-80% (titrated); and carbon content of 1-30% is claimed. An Independent claim is also included for the preparation of (I).

公开(公告)号：DE59906985D1

公开(公告)日：2003-10-23

申请号：DE59906985

申请日：1999-05-07

Applicant: DEGUSSA

Inventor： SCHUBERT JUERGEN DR ,  GLAUM HOLGER DR

IPC: C01B33/26

Abstract: Aqueous aluminum silicate suspension contains water and at least 30 wt.% aluminum silicate, 0.1-30 wt.% aluminum sulfate and 0.1-5.0 wt.% surfactant. An Independent claim is also included for a process for the production of the aluminum silicate suspension comprising precipitating and filtering off an aluminum silicate prepared synthetically from aluminum sulfate and water glass, liquefying the aluminum silicate filter cake with an aqueous aluminum sulfate solution with stirring and/or shearing, adding at least one surfactant, adding a powdered aluminum silicate to the filter cake with stirring and/or shearing, and stirring and/or shearing the mixture at least a further time.

公开(公告)号：AT250558T

公开(公告)日：2003-10-15

申请号：AT01119007

申请日：2001-08-07

Applicant: DEGUSSA

Inventor： SCHUBERT JUERGEN DR ,  HELLWIG KLAUS-DIETER ,  MUELLER ASTRID

IPC: C01B33/12 ,  B41M5/00 ,  B41M5/50 ,  B41M5/52 ,  C01B33/143 ,  C01B33/193 ,  C09C1/30 ,  C09C3/06 ,  C09D129/04 ,  D21H19/40

Abstract: Al-doped precipitated silica particles have a BET surface area above 300 m /g and uniformly distributed Al. An Independent claim is also included for production of the doped silica in which an Al salt solution is added in step (a) and (c) of the following process: (a) heating a water/Na silicate mixture to 70-86 degrees C and neutralizing the Na silicate with H2SO4; (b) ageing the solution for 30-120 minutes; (c) adjusting to pH 3-7 by addition of H2SO4; and (d) filtering and spray drying and milling the washed filter cake.

公开(公告)号：AT250008T

公开(公告)日：2003-10-15

申请号：AT99109070

申请日：1999-05-07

Applicant: DEGUSSA

Inventor： SCHUBERT JUERGEN DR ,  GLAUM HOLGER DR

IPC: C01B33/26

Abstract: Aqueous aluminum silicate suspension contains water and at least 30 wt.% aluminum silicate, 0.1-30 wt.% aluminum sulfate and 0.1-5.0 wt.% surfactant. An Independent claim is also included for a process for the production of the aluminum silicate suspension comprising precipitating and filtering off an aluminum silicate prepared synthetically from aluminum sulfate and water glass, liquefying the aluminum silicate filter cake with an aqueous aluminum sulfate solution with stirring and/or shearing, adding at least one surfactant, adding a powdered aluminum silicate to the filter cake with stirring and/or shearing, and stirring and/or shearing the mixture at least a further time.

公开(公告)号：DE19504284A1

公开(公告)日：1995-08-17

申请号：DE19504284

申请日：1995-02-09

Applicant: DEGUSSA

Inventor： KERNER DIETER DR ,  LORTZ WOLFGANG DR ,  SCHUBERT JUERGEN DR ,  GROHS JOACHIM

IPC: C11D3/08 ,  C11D3/10 ,  C01B33/32 ,  C02F5/00

Abstract: Homogeneous crystalline or partly crystalline alkali metal silicate/carbonate mixts. (I) have the compsn. M2SixO2x+1 . yNa2CO3 . zH2O, where M = Na or K, x = 1.5-3, y = 0.025-1 and z = 0-1, and have a Ca-binding power of at least 50 mg CaO/g anhydrous (I) at 20 deg C. Also claimed is the prodn. of (I) by dissolving an alkali metal carbonate or bicarbonate in an alkali metal silicate soln., or adding an alkali metal carbonate or bicarbonate soln. to an alkali metal silicate soln. to form a homogeneous soln. with a silicate/carbonate ratio as above; converting the soln. to a solid prod.; and heating the prod. at 200-550 deg C until the H2O content is as above. Also claimed is a process for softening water contg. Ca and/or Mg ions, comprising adding (I) to the water.