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    PARTIALLY HYDROPHOBIC PRECIPITATED SILICIC ACID, ITS PRODUCTION AND DEFOAMING AGENT INCLUDING THE SAME
    1.
    发明专利
    PARTIALLY HYDROPHOBIC PRECIPITATED SILICIC ACID, ITS PRODUCTION AND DEFOAMING AGENT INCLUDING THE SAME 失效

    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.

    PARTIALLY HYDROPHOBIC PRECIPITATED SILICIC ACID, METHOD FOR PRODUCING THE SAME AND ACTIVE SUBSTANCE FORMULATION CONTAINING THE SAME
    2.
    发明专利
    PARTIALLY HYDROPHOBIC PRECIPITATED SILICIC ACID, METHOD FOR PRODUCING THE SAME AND ACTIVE SUBSTANCE FORMULATION CONTAINING THE SAME 失效

    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.

    4.
    发明专利
    未知

    公开(公告)号：ES2128186T3

    公开(公告)日：1999-05-01

    申请号：ES97104825

    申请日：1997-03-21

    Applicant: DEGUSSA

    Inventor： OELMULLER ROLF ,  MULLER ASTRID ,  MEIER KARL ,  LUX HEINZ-GUNTHER ,  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.

    Partially hydrophobic precipitated silicas
    5.
    发明专利
    Partially hydrophobic precipitated silicas 未知

    公开(公告)号：HK1000701A1

    公开(公告)日：2000-04-07

    申请号：HK97102191

    申请日：1997-11-19

    Applicant: DEGUSSA

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

    IPC: C01B33/18 ,  A01N25/08 ,  A01N25/22 ,  A01N57/12 ,  B01D19/04 ,  C09C1/30 ,  C11D3/12 ,  C09C ,  C11D ,  A01N

    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.

    9.
    发明专利
    未知

    公开(公告)号：ES2204789T3

    公开(公告)日：2004-05-01

    申请号：ES01119007

    申请日：2001-08-07

    Applicant: DEGUSSA

    Inventor： SCHUBERT JURGEN DR ,  HELLWIG KLAUS-DIETER ,  MULLER 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.

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