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    33.
    发明专利
    未知

    公开(公告)号：DE50100670D1

    公开(公告)日：2003-10-30

    申请号：DE50100670

    申请日：2001-08-07

    Applicant: DEGUSSA

    Inventor： SCHUBERT 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.

    36.
    发明专利
    未知

    公开(公告)号：AT175224T

    公开(公告)日：1999-01-15

    申请号：AT97104825

    申请日：1997-03-21

    Applicant: DEGUSSA

    Inventor： OELMUELLER ROLF ,  MUELLER ASTRID ,  MEIER KARL ,  LUX HEINZ-GUENTHER ,  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 HYDROPHOBICALLY SEDIMENTED SILICIC ACID
    37.
    发明专利
    PARTIALLY HYDROPHOBICALLY SEDIMENTED SILICIC ACID 未知

    公开(公告)号：BG61818B1

    公开(公告)日：1998-06-30

    申请号：BG10136197

    申请日：1997-03-27

    Applicant: DEGUSSA

    Inventor： LUX HEINZ-GUENTER ,  MEIER KARL ,  MUELLER ASTRID ,  OELMUELLER ROLF ,  RAMB ANJA

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

    Abstract: The acid can be used in the formulation of active substancesand of hydrolysis-sensible substances and in anti-foaming agents.It has methanol wettness from to 49%, in particular with DBPabsorption, it is anhydrous, its concentration is over 250 g/100g, and the average size of the particles ranges from 1 to 12 m,and/or with carbon content 0.3-1.85%, and/or drying loss from 2.6to 10.0%, and/or pH from 5.5 to 10.0. It is produced when thehydrophobic substance is mixed with the suspension of thesedimented silicic acid for a short time and at low pH. The solidsubstance is filtered, washed to the absence of salts, dried, heattreated and is ground.

    Partially hydrophobic precipitated silica
    38.
    发明专利
    Partially hydrophobic precipitated silica 未知

    公开(公告)号：DE19713316A1

    公开(公告)日：1997-11-06

    申请号：DE19713316

    申请日：1997-03-29

    Applicant: DEGUSSA

    Inventor： OELMUELLER ROLF ,  MUELLER ASTRID ,  MEIER KARL

    IPC: C01B33/18 ,  A01N25/08 ,  A01N25/22 ,  A01N57/12 ,  B01D19/04 ,  C09C1/30 ,  C11D3/12 ,  A61K47/02 ,  A23K1/175

    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.
    40.
    发明专利
    Partially hydrophobic precipitated silicas. 未知

    公开(公告)号：ZA972626B

    公开(公告)日：1997-10-20

    申请号：ZA972626

    申请日：1997-03-26

    Applicant: DEGUSSA

    Inventor： LUX HEINZ-GUENTER ,  MEIER KARL ,  MUELLER ASTRID ,  OELMUELLER ROLF ,  RAMB ANJA

    IPC: C01B33/18 ,  A01N25/08 ,  A01N25/22 ,  A01N57/12 ,  B01D19/04 ,  C09C1/30 ,  C11D3/12 ,  C01B ,  A01N ,  A23K

    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.

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