公开(公告)号：JP2000159516A

公开(公告)日：2000-06-13

申请号：JP34914099

申请日：1999-12-08

Applicant: DEGUSSA

Inventor： LUX HEINZ-GUNTER ,  MEIER KARL ,  MULLER ASTRID ,  OELMULLER ROLF ,  RAMB ANJA

IPC: C01B33/18 ,  A01N25/08 ,  A01N25/22 ,  A01N57/12 ,  B01D19/04 ,  C09C1/30 ,  C11D3/12

Abstract: PROBLEM TO BE SOLVED: To provide partially hydrophobic precipitated silicic acid suitable as a carrier for functional substances sensitive to hydrolysis. SOLUTION: This partially hydrophobic precipitated silicic acid is produced by blending an hydrophobicity agent with precipitated silicic acid suspension in a short duration time at low pH value, by the solid-liquid separation through filtration, by washing the solid so as for it to include salts and by drying it, followed by heat treatment and then by grinding the heat-treated solid. The partially hydrophobic precipitated silicic acid has 10-49% wettability in methanol and >250 g/100 g DBP absorption (moisture-free) or 1-12 μm average particle diameter and/or 0.3-1.85% carbon content and/or 2.6-10.0% loss on drying and/or 5.5-10.0 pH value and is applicable to a functional substance formulated product, a formulated product of a functional substance sensitive to hydrolysis and a defoaming agent.

公开(公告)号：JP2002020112A

公开(公告)日：2002-01-23

申请号：JP2001161074

申请日：2001-05-29

Applicant: DEGUSSA

Inventor： LUX HEINZ-GUNTER ,  MEIER KARL ,  MULLER ASTRID ,  OELMULLER ROLF ,  RAMB ANJA

IPC: C01B33/18 ,  A01N25/08 ,  A01N25/22 ,  A01N57/12 ,  B01D19/04 ,  C09C1/30 ,  C11D3/12

Abstract: PROBLEM TO BE SOLVED: To provide partially hydrophobic precipitated silicic acid, a method for producing the silicic acid and a formulation for the use of the silicic acid as a carrier for an active substance sensitive to hydrolysis and for the use of the silicic acid in a defoaming agent. SOLUTION: A hydrophobicity imparting agent and a suspension of precipitated silicic acid are mixed in a short retention time at a low pH and the solid is separated by filtration, washed to a salt-free state, dried, heat-treated and comminuted to produce the objective partially hydrophobic precipitated silicic acid having 10-49% methanol wettability, >250 g/100 g DBP(dibutyl phthalate) absorption (anhydrous) or 1-12 μm average particle diameter and/or 0.3-1.85% carbon content and/or 2.6-10.0% drying loss and/or pH 5.5-10.0. This partially hydrophobic precipitated silicic acid can be used in an active substance formulation, in an active substance formulation of a substance sensitive to hydrolysis and in a defoaming agent.

公开(公告)号：JPH107415A

公开(公告)日：1998-01-13

申请号：JP7475997

申请日：1997-03-27

Applicant: DEGUSSA

Inventor： LUX HEINZ-GUNTER ,  MEIER KARL ,  MULLER ASTRID ,  OELMULLER ROLF ,  RAMB ANJA

IPC: C01B33/18 ,  A01N25/08 ,  A01N25/22 ,  A01N57/12 ,  B01D19/04 ,  C09C1/30 ,  C11D3/12

Abstract: PROBLEM TO BE SOLVED: To obtain a partially hydrophobic precipitated silicate, usable in an active matter-formulated body, in an active matter-formulated body in which the active matter is sensitive to hydrolysis and in a defoaming agent. SOLUTION: This partially hydrophobic precipitated silicate is produced by mixing a hydrophobicity-imparting agent and a precipitated silicate suspension in a short retention time at a low pH value, filtering and separating solids, washing the separated solid until it becomes free from salts, and drying, heating and pulverizing the washed solid. The obtained silicate has a methanol wetting factor of 10-49%, and it optionally has a DBP-absorption (anhydrous) of a larger than 250g/100g or an average particle diameter of 1-12μm and/or a carbon content of 0.3-1.85% and/or a loss on dry of 2.6-10.0% and/or a pH value of 5.5-10.0.

公开(公告)号：AU1658097A

公开(公告)日：1997-10-02

申请号：AU1658097

申请日：1997-03-26

Applicant: DEGUSSA

Inventor： LUX HEINZ-GUNTER ,  MEIER KARL ,  MULLER ASTRID ,  OELMULLER ROLF ,  RAMB ANJA

IPC: C01B33/18 ,  A01N25/08 ,  A01N25/22 ,  A01N57/12 ,  B01D19/04 ,  C09C1/30 ,  C11D3/12 ,  C01B33/141 ,  B01D19/02 ,  A01N25/02

Abstract: Partially hydrophobic precipitated silica with a methanol crosslinking potential of 10-49% is new. When anhydrous, the silica has a DBP absorption > 250 g/100 g. The average particle size is 1-12 mu m and the silica has a carbon content of 0.3-1.85 %, and when dried, it loses 2.6-10 % of its weight. It has a pH of 5.5-10. The silica is prepared by mixing a silica suspension (which has been prepared using known methods) with a material that gives the silica hydrophobic properties. The mixing takes place for a very short time at conditions of low pH and high shear. The resulting suspension is filtered and washed in salt-free conditions, and the filter cake is dried, thermally treated and powdered.

公开(公告)号：IN191468B

公开(公告)日：2003-12-06

申请号：IN475CA1997

申请日：1997-03-17

Applicant: DEGUSSA

Inventor： LUX HEINZ-GUNTER ,  MEIER KARL ,  MULLER ASTRID ,  OFLMULLER ROLF ,  RAMB ANJA

IPC: C01B33/18 ,  A01N25/08 ,  A01N25/22 ,  A01N57/12 ,  B01D19/04 ,  C09C1/30 ,  C11D3/12

Abstract: Partially hydrophobic precipitated silica with a methanol crosslinking potential of 10-49% is new. When anhydrous, the silica has a DBP absorption > 250 g/100 g. The average particle size is 1-12 mu m and the silica has a carbon content of 0.3-1.85 %, and when dried, it loses 2.6-10 % of its weight. It has a pH of 5.5-10. The silica is prepared by mixing a silica suspension (which has been prepared using known methods) with a material that gives the silica hydrophobic properties. The mixing takes place for a very short time at conditions of low pH and high shear. The resulting suspension is filtered and washed in salt-free conditions, and the filter cake is dried, thermally treated and powdered.

公开(公告)号：HK1003382A1

公开(公告)日：1998-10-30

申请号：HK98102582

申请日：1998-03-26

Applicant: DEGUSSA

Inventor： LUX HEINZ-GUNTER ,  MEIER KARL ,  MULLER ASTRID ,  OELMULLER ROLF ,  RAMB ANJA

IPC: C01B33/18 ,  A01N25/08 ,  A01N25/22 ,  A01N57/12 ,  B01D19/04 ,  C09C1/30 ,  C11D3/12 ,  C01B

Abstract: Partially hydrophobic precipitated silica with a methanol crosslinking potential of 10-49% is new. When anhydrous, the silica has a DBP absorption > 250 g/100 g. The average particle size is 1-12 mu m and the silica has a carbon content of 0.3-1.85 %, and when dried, it loses 2.6-10 % of its weight. It has a pH of 5.5-10. The silica is prepared by mixing a silica suspension (which has been prepared using known methods) with a material that gives the silica hydrophobic properties. The mixing takes place for a very short time at conditions of low pH and high shear. The resulting suspension is filtered and washed in salt-free conditions, and the filter cake is dried, thermally treated and powdered.

公开(公告)号：ID18471A

公开(公告)日：1998-04-09

申请号：ID971078

申请日：1997-03-31

Applicant: DEGUSSA

Inventor： LUX HEINZ-GUNTER ,  MEIER KARL ,  MULLER ASTRID ,  OELMULLER ROLF ,  RAMB ANJA

IPC: C01B33/18 ,  A01N25/08 ,  A01N25/22 ,  A01N57/12 ,  B01D19/04 ,  C09C1/30 ,  C11D3/12 ,  B01D17/00

Abstract: Partially hydrophobic precipitated silica with a methanol crosslinking potential of 10-49% is new. When anhydrous, the silica has a DBP absorption > 250 g/100 g. The average particle size is 1-12 mu m and the silica has a carbon content of 0.3-1.85 %, and when dried, it loses 2.6-10 % of its weight. It has a pH of 5.5-10. The silica is prepared by mixing a silica suspension (which has been prepared using known methods) with a material that gives the silica hydrophobic properties. The mixing takes place for a very short time at conditions of low pH and high shear. The resulting suspension is filtered and washed in salt-free conditions, and the filter cake is dried, thermally treated and powdered.